H. L. Scientific IndustriesH. L. Scientific Industries

Engineering Electronic Instruments

We are manufacture, supplying & Export  a wide range of Engineering Electronic Instruments like Electronic instruments, Characteristic of Vacuum Tubes (Valves) Characteristic of Semiconductor Devices, Lase Experiments,Nuclear Physics(G.M. Counter), Michelson Interferometers,Verification of Network Theorems, Verification of Taining Kit of Physics lab various Laws & Convertion of Signal, Characteristic of Rectifier,Filters Circuit & Regulators, Amplifiers Training Kit, Characteristic & Applications of Operational Amplifiers, Experiments of calculate e/m, Oscillators, Study of Multivibrators & applications of IC 555, Training Kit on Digital Electronic Experiements, Training Kit of Communication Lab, Function Generators, Digital/Analog testing & Measuring Instruments,Microwave Training Kit, Demonstration Training Kit,Microprocessor Trainer,Moving Coil Meters, ballistic Galvanometer,Resistance Box, Post Office Box,Condenser Boxes, UV VIS Spectrophotometer, Microprocessor UV-VIS Spectrophotometer,Digital Spectrophotometer,Digital Flame Photometer, Auto Karl Fischer Titrimeter, Digital PH, Conductivity, & Temperature Meters, Digital Colony Counter, Filter Photo Calorimeter, Digital Ph Meters, Poratable Water & Soil Anaalysis kits, laboratory Conductivity Meters,Total Dissolved Solids Meters, Digital Dissolved Oxygen Meters, Digital Potentiometers, Digital Turbidity Meters, Digital Microprocessor Haemoglobin Meters etc.

Ultrasonic Interferometer for Liquids

Item Code:HL-8073

'Physilab' manufactures, exports and supplies ultrasonic interferometer, a simple and direct device which are designed and fabricated for determining the ultrasonic velocity in liquids with a high degree of accuracy in the field of laboratory purpose in engineering colleges. Besides, the company is one of the most reputed ultrasonic interferometer suppliers in India and abroad.
ultrasonic interferometer of liquid consists of:-1. R. F. Oscillator 3-8 mhz2. Specially design long tube spectrometer3. Crystal tank4. Sodium lamp5. Sodium lamp transformer6. Wooden box for sodium lamp





Ultrasonic Interferometer for Liquids

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L.C.R. Bridge

Item Code:HL-8077

'PHYSILAB' L.C.R. Bridge 

 

Fully Solid state instrument, workable on 220 V 50 Hz or on 9 Volts Battery, useful for the wide range measurement of Resistance, Capacitance and Inductance.
Resistance Range : 0.01 Ohms to 1 Meg Ohms in seven ranges. Capacitance 2 PF to 110 MFD. Inductance 2 micro Henries to 110 Henry in seven ranges Accuracy ±1%, D-0.001 to 10Q=1 to 10.

Dimension 14"x9"x5½".






L.C.R. Bridge

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Reflex Klyston Microwave Test Bench

Item Code:HL-675

HL-675 Reflex Klyston Microwave Test Bench

Experiments:

  • To study the characteristic of reflex klyston.
  • To study the frquency, guide wavelength & free space wave length.
  • To measure SWR & reflection co- efficient.
  • To measure impedance of a load.

 

Test Bench Specifications:

Component  Name

Qty.

Klystron power supply

1

Klystron Tube

1

Frequency Meter

1

Slotted Section

1

Detector Mount

1

Matched Termination

1

Wave Guide Stands

1

BNC Cable

1

Fixed Short

1

Klystron Mount

1

Isolator

1

Variable Attenuator

1

Tunable Probe

1

Movable Short

1

VSWR Meter Solid State

1

SS Tuner

1

Cooling Fan

1






Reflex Klyston Microwave Test Bench


Electronic Instruments

We offer our customers a wide range of electronic instruments under the name PN Junction/Zener Diode. These are made available in both standard & customized specifications. Some of the features of these process and testing equipment used include:

 

Other Products


  • 8085 Microprocessor Trainer
  • AC moving coil meters
  • AC/DC Power Supply 0-50V/4Amp
  • Application of Operational Amplifier
  • Auto Karl Fischer Titrimeter
  • Ballistic Galvanometer
  • Basic Logic Gate using discrete components (7 in 1)
  • Battery Eliminator
  • Black & White Television Demonstrator with 14" CRT
  • Bridges
  • Colour Television Demonstration with 20" CRT
  • Conductivity Meters Microprocessor Based
  • CRO Demonstrator 20 Mhz
  • Digital Colony Counter
  • Digital Dissolved Oxygen Meters
  • Digital Filter Photo Calorimeter
  • Digital Flame Photometer
  • Digital HB Meter
  • Digital pH meters
  • Digital Spectrophotometer
  • e/m by Thomson Method (Bar Magnet Method)
  • FET Characteristics apparatus

Model Equipment

Power Rating

HL-475

Sodium Lamp Transformer

35 Watt

HL-464

Power Supply AC/DC

2-12V/2Amp

 

Characteristics Apparatus (Forward & Reverse V-l Characteristics):


Objective: To study forward & reverse characteristics of PN Junction Diode and Zener Diode.

 

Features:


Instrument comprises of –

  • Two DC power supplies
  • Two round meters to measure voltage & current
  • 1 PN Junction Diode
  • 1 Zener Diode mounted behind panel with option of connections brought out at terminal /sockets

 

HL-490:


These also come with digital panel meters that provides in them optimum functionality.

 

Available Range:

Range provided by us include:

  • HL-585: Operational Amplifier IC - 741 Trainer with Digital Panel Meter
  • HL-413: Battery Charger 2-12 VDC/3 Amp
  • HL-425: 0-30 VDC/2 Amp
  • HL-539

 

BH Curve Apparatus:

Objective: To trace Hysteresis curves on CRO using Capacitance, Resistance & Inductance

 

Features:


  • Instrument comprises of AC Power Supply 3-15 VAC
  • Output selectable using band switch
  • Printed circuit diagram for BH curve
  • Components connected behind the front panel
  • Provision for connecting external inductance
  • Input & output connections brought out at sockets

 

HL-534

Resistance in Series & Parallel Apparatus:

Objective: To verify properties of resistances when connected in series & parallel.


"See attachment for more details"





Electronic Instruments

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Voltage Doubler And Tripler Circuit

Item Code:HL-8008

Objective:- To study voltage multiplication using diodes. Resistance & capacitors.

Features:- Instruments  comprises of ac power supply with output selectable using band switch,circuit diagram of doubler and tripler printed & components mounted on the front panel.



Voltage Doubler And Tripler Circuit

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G.M.Counter hot

HL-520 G.M. counters offered by us are used in G.M. tubes and come with digital read out meter facility. These digit counting systems are also provided with control for reset, start & stop through panel. Some of the features of these counters include:

  • One pro-set-able timer with three digit display & thumb wheel switch
  • G.M. Tube mounted in acrylic stand
  • One radioactive source in lead container
  • Digital multi-meter to read the G.M. Tube voltage




G.M.Counter

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Study Of Microwave Test Bench Universal Model

Item Code:HL-678

HL-678 study of microwave test bench universal model

Experiments:

  •  To study the characteristics of reflex klystron & Gunn Diode.
  •  To study frequency, guide wavelength & free space wave length.
  •  Top measure SWR & reflection coefficient. & impedance of a load.
  •  To measure polar pattern & gain of antennas.
  •  To measure the dielectric constant of Liquid & Solid cells
  •  To measure phase shift & "Q" of a cavity
  •  To study Magic Tee. E & H Plane Tee, Directional Coupler. Isolators Circulators & Return Loss Measurement.

 

Component  Name

Qty.

Klystron power supply

1

Gunn Power Supply

1

Pin Modulator

1

Frequency Meter

1

Slotted Section

1

Detector Mount

1

Matched Termination

1

Stand

4

BNC Cable

3

Fixed Short

1

Pyramidal Horn

2

Parabolic Disc

1

Bends E & H Plane

1

Liquid Dielectric Cell

1

Fixed Attenuator

2

Circulator

1

Klystron Mount & Tube

1

Gunn Oscillator

1

Isolator

1

Variable Attenuator

1

Tunable Probe

1

Movable Short

1

VSWR Meter Solid State

1

S S Tunner

1

Cooling Fan

1

Radiation Pattern Turn table

1

Coaxial to Wave Guide Adopter

1





Study Of Microwave Test Bench Universal Model

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Study Of Microwave Component

Item Code:HL-677

HL-677 Study of  Microwave Component (Magic Tee, Directional Coupler, Isolator, Circulator)
Experiments:
1.
To study Magic Tee, Directional Coupler, Isolators & Circulators.
2. To measure charcteristics of detector diode.
3. To study attenuation measurements.
4. To study the return loss measurements.

Component  Name

Qty.

Klystron power supply

1

Klystron Tube

1

Frequency Meter

1

Fixed Attenuator 3,6,10db

3

Detector Mount

1

Slotted Section

1

VSWR Meter Solid State

1

S S Tunner

1

Cooling Fan

1

MHD Coupler 3,10,20db

3

E-Plane Tee

1

Klystron Mount

1

Isolator

1

Variable Attenuator

1

Magic Tee

1

Movable Short

1

Tunable Probe

1

Stands

4

BNC Cable

1

Matched termination

1

Cirulator

1

H-Plane Tee

1





Study Of  Microwave Component

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To Measure The Polar Pattern Of The Antenna

To measure the polar pattern of the antenna
Experiments:
1. To measure the polar pattern &  gain of the antennas (Pyramidal horn. Pick up horn, slotted horn, Dielectric horn, sectorial horn & parabolic disc).

Components Name   

Qty.

 

 

Klystron Power Supply

1

Klystron Mount

1

Klystron Tube

1

Isolator

1

Frequency Meter

1

Variable Attenuator

1

Radiation Pattern turn table

1

Standard gain horn

2

Detector mount

1

Cooling fan

1

VSWR meter solid state

1

Sectoral horn-E-plane

1

Sectoral horn-H-plane

1

Parabolic disc

1

Coaxial to W/G adopter

1

Twist

1

Moveable Short Precision

1

Stand

4

Bends

2

Tripod Stand

1

BNC Cable

1

 

 






To Measure The Polar Pattern Of The Antenna

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To Measure Dielectric Constant Of Solid And Liquid

Experiment to Measure Dielectric Constant of Solid
& Liquid and to Measure Phase Shift & 'O' of a Cavity
Experiments:
1. To measure dielectric constant of liquid.
2. To measure dielectric constant of solids.
3. To measure phase shift.
4. To measure 'Q' of a cavity.

Components Name   

Qty.

 

 

Klystron Power Supply

1

Klystron Mount

1

Klystron Tube

1

Isolator

1

Frequency Meter

1

Variable Attenuator

1

Slotted Section

1

Tunable probe

1

Detector Mount

1

Solid dielectric cell

1

Liquid Dielectric cell

1

VSWR meter solid state

1

Stand

4

Wave guide cavity

1

BNC Cable

1

Cooling Fan

1

Movable Short precision

1

Phase Shifetr

1

Set of Dielectric

1

 

 





To Measure Dielectric Constant Of Solid And Liquid

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To Study Of Gunn Diode Microwave Test Bench

HL-676 To Study of Gunn Diode Microwave Test Bench
Experiments:
1.
To study the characteristics of Gunn Diode.
2. To study the frequency, guide wavelength & free space wavelength.
3. To measure SWR & reflection coefficient.
To measure impedance of a load.

Components Name   

Qty.

 

 

Gunn Power Supply 

1

Gunn Mount    

1

Pin Modulator          

1

  Isolator       

1

Frequency Meter   

1

Variable Attenuator   

1

Slotted Section        

1

Tunable Probe 

1

Detector Mount  

1

Movable Short 

1

Matched Termination    

1

VSWR meter solid state 

1

Wave Guide Stands  

4

SS Tuner    

1

BNC Cable               

3

  Cooling Fan            

1

Fixed Short  

1

 

 





To Study Of Gunn Diode Microwave Test  Bench

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Helium Neon Laser Light

Item Code:HL-8075

Helium neon laser light
A 2 milliwatt laser, mountable on optical bench, with in built power supply workable on 220v ac, 50hz. Design for continues working. Highly rugged mechnical setup. Up-down motion for beam.

Laser accessories:-
1. Low line diffrection grating for laser wave length
2. Young's double slit
3. Hand micrometer
4. Grating stand
5. Laser filter
6. Set of 13  (demo kit)
single taper slit, holes a,b,c,d, grey filter, multiple slit, circular opaque, spot, mesh, multiple slit 5 grid pattern.  



Helium Neon Laser Light


Logic Gates Experiment (Six in One)

Item Code:HL-8001

To verify the truth table for AND, NAND, OR, NOR, NOT, Ex-Or. Instrument comprises of 5V Power supply for logic '1' & Logic '0'. TTL IC is used for Gate & circuit diagram printed on the front panel & connection brought out at sockets.





Logic Gates Experiment (Six in One)

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Study Of Resistance In Series

Item Code:HL-8002

To verify properties of Resistence when connected in series & parallel. Instrument comprises of Tww moving coil meters to measure voltage & current, circuit diagram for series & parallel connections, Resistence mounted along with circuit diagram.



Study Of Resistance In Series

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Study Of Resistence In Parallel

Item Code:HL-8003

To verify properties of Resistence when connected in series & parallel. Instrument comprises of two moving coil meters to measure voltage & current, circuit diagram for series & parallel connections, Resistence mounted along with circuit diagram.



Study Of Resistence In Parallel

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Wein Bridge Oscillator

Item Code:HL-8004

Wein Bridge Oscillator using Operational Amplifier Transistor.

Objective:
To study the Frequency and Wave shape generated by wein Bridge Osillator.

Feature: Instrument comprises of 12V DC Regulated Power Supply, Circuit diagram Printed & components mounted on front panel.





Wein Bridge Oscillator

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Study Of Half And Full Wave And Bridge Rectifier Apparatus

Item Code:HL-8005

Study of Half Wave/Full wave & Bridge Rectifier Apparatus with 3 Meters.

Objective: To study efficiency & Ripple factor in case of Half Wave, Full wave & Bridge rectifier on application of load & filters.

Features: Instrument comprises of AC Power Supply, 3 meters to measure Output Voltage & Output current, 4 PN Junction Diodes, Filter Circuit Kit, load Resistances selectable using band switch.



Study Of Half And Full Wave And Bridge Rectifier Apparatus

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Photo Diode Characteristics Apparatus

Item Code:HL-8006

To plot a current versus intensityof light at different value of volatges. Instrument consist of dc regulated power supply, two round meters for voltage & current measurement, photo diode mounted separately on the panel, connections of supplies & photo diode brought out at terminals/sockets with light source.



Photo Diode Characteristics Apparatus

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Photo Cell Charcteristic Apparatus

Item Code:HL-8007

Objective: to plot forward & reverse charcteristics of a selenium photo cell verify inverse square law of light.

Features: selenium photo cell mounted in meal box having window for injecting light, light source with 60w lamp, photocell kit with dc micro ammeter of 1000ma & dc millivoltmeter of 500mv.



Photo Cell Charcteristic Apparatus

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Decade Resistence Box

Item Code:HL-8009

Code
 No.
 

Sub Division

TOTAL

140
141
142
143
144
Single Dial
"
"
"
"
0.1
1
10
100
1000
1
10
100
1000
10000
145
146
147
148
Two Dials
"
"
"
0.1 &1
1 & 10
10 & 100
100 & 1000
11
110
1100
11 K
149
150
151
Three Dials
"
"
0.1, 1 & 10
1, 10 & 100
10, 100 & 1000
111
1110
11.1 K
152
153
Four Dials
"
0.1, 1, 10 & 100
1, 10, 100 & 1 K
1111
11.11 K
154 Five Dials 0.1, 1, 10, 100 & 1000 11.111 K
155 Six Dials 0.1, 1, 10, 100, 1 K & 10 K 111.111 K

Switches Used          : Brass with silver Plating
Resistance used       :  Wire wound, wound non-inductively on Bakelite
spools, heat treated & processed for ageing, varnish coated.
All resistances are of 1 watt.
Wire Used : Constantan Accuracy 0.1%, Manganin 0.05%.

 

 





Decade Resistence Box

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Two Stage RC Coupled Transistor Amplifier

Item Code:HL-8010

Objective: study frequency response of single stage & two stage rc coupled common emitter transistor amplifier.

Features: instrument comprises of dc regulated power supply, circuit diagram is printed, components mounted on the front panel.



Two Stage RC Coupled Transistor Amplifier

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Hartley Oscillators

Item Code:HL-8011

Objective: to study the frequency and wave shape generated by a hartley oscillator.

Features: instrument comprises of 12v dc regulated power supply, circuit diagram prinetd & components mounted on front panel.



Hartley Oscillators

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Triode Valve Characteristics Apparatus

Item Code:HL-8012

Objective: vi characteristics of triode valve at various grid voltages.

Features: instrument comprises of dc regulated power supply 0-300vdc/30ma & 0-25vdc/10ma, ac power supply 6. 3 vac/1amp. There round meters for voltages & current measurement, valve diagram is printed on front panel, connections of supplies & valve brought out at 4mm socket.



Triode Valve Characteristics Apparatus

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Study Of Adder And Subtractor

Item Code:HL-8013

Objective: To verify the Truth Table of Digital Half Adder, Half Subtractor, Full Adder & Full Subtractor.

Features: Instrument comprises of DC Regulated Power Supply 5VDC/150mA for logic inputs, 3 SPDT switches provided for selecting logic '1' & logic '0', 2 Red LED output indicator, circuit diagram printed their respective IC's placed inside the cabinet & connections brought out at sockets.



Study Of Adder And Subtractor

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Energy Band Gap For Semi Conductor Diode

Item Code:HL-8014

Objective: To plot reverse saturation current Vs Temperature in reverse bioased PN Junction Diode.

Features: Instrument comprises of DC regulated Power Supply 0-20VDC/150mA two round meters for voltage & current measurement, one PN junction Diode (Ge Type) is kept in Oven, connections of supplies, Meters & Diode brought out at 4mm sockets. Also provided with Oven wih temperature control knob.



Energy Band Gap For Semi Conductor Diode

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Thermistor Characteristics Apparatus

Item Code:HL-8015

Objective: To plot negative Resistance co-efficient Characteristics of a Glass Thermistor.

Features: Instrument comprises of DC Regulated Power Supply 00-10VDC/150mA two round meters for voltage & current measurement, one Glass Thermistor is kept in Oven, connections of supplies, Meters & Thermistor brought out at 4mm sockets. Also provided with Oven with temperature control knob.



Thermistor Characteristics Apparatus

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Battery Charger

Item Code:HL-8016

  • A    battery charger  2-12 vdc/1 AMP
  • B    battery charger  2-12vdc/2 AMP
  • C    battery charger  2-12vdc/3 AMP
  • D    battery charger 2-12vdc/5 AMP
  • E     battery charger
  •       6vdc/12vdc/ 3 AMP with fine current control.
  • F     battery charger  6vdc-12vdc/5 AMP with fine current control.  




Battery Charger

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Study Of Instruments Operational Amplifier

Item Code:HL-8017

Study of instruments operational amplifier IC-741 with digital panel meters
objective:- calculate the voltage gain of instruments amplifier and draw a curve between v & ar.

Features:-

Instruments comprises of one  ± 12 VDC regulated power supply,2dc regulated short circuit and overload protected continuously variable power supplies,3 no- IC 741 placed inside & connections brought out at sockets. One potentiometer and combination of resistance placed on the front panel.  



Study Of Instruments Operational Amplifier

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LDR Characteristic Apparatus

Item Code:HL-8018

Objective:- to plot a graph,current vs intensity of light at different value of voltage.
Features:- instrument comprises of DC regulated power supply 0-3 vdc/150ma,two round meters for voltage & current measurement. LDR mounted on the panel, connections of supplies & LDR brought out at 4mm sockets. Lamp holder with 60w bulb are given with this apparatus.



LDR Characteristic Apparatus

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Ohm's Law Apparatus

Item Code:HL-8019

objective:- to verify ohm's law i. E v=1r
features:-
  instruments comprises of two moving coil meters to measure voltage & current, one wire wound potentiometer. Circuit diagram printed & connections brought out at terminals for connection 6 volts battery & one wire wound resistance.



Ohm's Law Apparatus

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BH Curve Apparatus

Objective:- to trace hystersis curves on cro using resistance,capacitance & inductance.
features:- instruments comprises of ac power supply 3-15 vac, output selectable using band switch,circuit diagram of DH curve printed, components behind the front panel, provision for connecting external inductance,input & output connections brought out at sockets.



BH Curve Apparatus

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Hall Effect Experiment

Item Code:HL-8021

introduction:

the resistivity measurements of semiconductors can not reveal whether one or two types of carriers
are present; nor distinguish between them. However, this information can be obtained from hall
coefficient measurements, which are also basic tools for the determination of carrier density and
mobilities in conjunctions with resistivity measurement.

hall effect experiment consists of the following:

1) . Hall probe (ge. Crystal mounted on a pcb).

2) . Electromagnate 10,000 gauss.

3) . Power supply for electromagnete.

4) . Constant current power supply with two digital meters.

digital millivotmeter 0-200mv sensitivity ± o. Lmv. Auto polarity.
digital milli ampere-meter 0-20ma , sensitivity ± 0. 01ma.

5) . Digital gauss meter with hall probe, 20kg .

 





Hall Effect Experiment

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Plank's Constant Apparatus

Item Code:HL-8022

Objective:- to plot forward & reverse chat of a vacuum photo cell & to calculate its stopping potential.
features:-  dual range power supply 0-1vdc/0-50 VDC with one dual range voltmeter & one sensitive center zero galvanometer of 25µa movement. Photo cell mounted in wooden box having window for injecting light & also for sliding the various filters. One wooden plank with 1/2 meter scale, light source with 100w lamp 7 set of filters.





Plank's Constant Apparatus

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Ohm's Law Apparatus With Digital Panel Meters

Item Code:HL-8023

objective:- to verify ohm's law i. E v=1r
 
features:-  instruments comprises of two digital panel meters to measure voltage & current,one wire wound potentiometer. Circuir diagram printed & connections brought out at terminals for connecting 6 volts battery & one wire wound resistance.



Ohm's Law Apparatus With Digital Panel Meters

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E/m By Short Solenoid Method (Magnatron Method)

Item Code:HL-8025

Objective:-  To study charge of an electron using short solenoid method.
Features:-
  Kit Comprises of Low Volatge DC Power Supply unit with Filament Volatge & Solenoid Current controls. Two meters are provided for Anode Volage controls. One Solenoid  Unit Comprises of one Solenoid mounted on wooden stand & Valve 41 is Kept in the Solenoid pipe. 





E/m By Short Solenoid Method (Magnatron Method)

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Basic Logic Gate 3 Using TTL IC's (7 & In ONE)

Item Code:HL-8027

Objective:- To verify the truth table for TTL AND,OR,NOT,NAND,NOR,EX-OR & EX-NOR gates.

Features:-
Instruments comprises of 5V/150ma DC regulated power supply for logic '1` & logic'0'.



Basic Logic Gate 3 Using TTL IC's (7 & In ONE)

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Fet Characteristic Apparatus With Regulated Power Supplies.

Item Code:HL-8028

Objective:- to plot static & transfer characteristic.
Features:- instruments comprises of two dc regulated power supplies 0-15 vdc/150ma & 0-5 vdc/150ma three round meters for voltage & current measurement,fet bfw 10 mounted behind the panel,connections of supplies,meters & fet brought out at 4mm sockets.



Fet Characteristic Apparatus With Regulated Power Supplies.

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PN Junction/ Zener Diode Characteristic Apparatus

Item Code:HL-8029

Objective:- to study forward & reverse characteristic of PN junction diode & zener diode.
features:- instruments comprises of two dc power supplies,two round meters to measure for voltage & current, 1 PN junction diode & 1 zener diode mounted behind the panel & connections brought out t terminals/sockets.



PN Junction/ Zener Diode Characteristic Apparatus

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E/M By Thomson Method (Bar Magnet Method)

Item Code:HL-8030

Objective:- To study charge of an elctron using thomson method.
Features:-
High voltage power supply with one meter provided to measure the deflection voltage. Complete with intensity, focus & deflection controls.
it is provided with accessories such as compass box,set of elico magnets,teak wood stand with crt mounted,teak wood u stand with scale on both theorems for placing magnets.



E/M By Thomson Method (Bar Magnet Method)

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Transistor Characteristic Apparatus

Item Code:HL-8031

objective:- input & output characteristic of comman base pnp & npn transistor. Input & output characteristic of comman emitter pnp & npn transistor.

features :-
instruments comprises of two dc regualted power supplies 0-10 volt/500 micro amp/50 ma, 0-1vdc/30ma, four round meter for voltage & current measurement,one pnp & one npn transistor mounted behind the panel, connection of supplies & transistores brought out on terminals or 4mm sockets.



Transistor Characteristic Apparatus

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Function Generator

Item Code:HL-8032

Generates frequency from 1hz to 250khz in 6 steps wave from is sine, square and triangular. Output is variable from 0 to 10 volts. Accuracy

±3% or 2hz. Output impedance 50ohms. Solid state. Workable on 220v 50hz complete i. C. Version with coarse and fine controls for output and frequency selection.
dimension 11"x5½"x5".





Function Generator

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Sodium Vapour Lamp Transformer

Item Code:HL-8033

Sodium vapour lamp transformer are housed in iron cabinet and nicely painted.

a)         35 watt
b)         55 watt





Sodium Vapour Lamp Transformer

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Schering Bridge

Item Code:HL-8034

For measurement low capacitances. The bridge comprises 3 decade dials of standard capacitors of .001, .01 & 1 mfd. Two Resistive Ratio dials. A variable condenser 0-1000 pF and three resistive decade dials of 1, 10 & 100 ohms Manganin Coils Accuracy 0 .1 %



Schering Bridge

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Pn Junction/zener Diode Charactristic Apparatus

Item Code:HL-8035

pn junction/zener diode charactristic apparatus with digital panel meter
objective:- to study forward & reverse characteristic of pn junction diode & zener diode.
features:-
instruments comprises of two dc power supplies,two digital panel meters to measure for volatge & current, 1 pn junction diode & 1 zener diode mounted behind the panel & connections brought out t terminals/sockets.



Pn Junction/zener Diode Charactristic Apparatus

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IC Regulated Power Supply

Item Code:HL-8036

  1. 0-15vdc/1amp. With one moving coil 72mm acrylic square voltmeter
  2. 0-15vdc/2amp. With one moving coil 72mm acrylic square voltmeter.




IC Regulated Power Supply

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Ic Regulated Power Supply 0-30 V - 2 Amp.

Item Code:HL-8037

Single Channel Continuously Variable DC Regulated Power Supplies with two meters.

a) 0-15VDC/1Amp.
b) 0-30VDC/1Amp.
c)  0-30VDC/3Amp.
d) 0-30VDC/10Amp.
e) 0-60VDC/2Amp.
f)  0-300VDC/100mA.
g)  0-300VDC/1Amp.
h)  0-15VDC/2Amp.
i)   0-30VDC/2Amp.
j)   0-30VDC/5Amp.
k)  0-60VDC/1Amp.
l)   0-60VDC/5Amp.
m) 0-300VDC/500mA.
n)  0-500VDC/100mA.





Ic Regulated Power Supply 0-30 V - 2 Amp.

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Digital To Analog Converter Using R-2r Network

Item Code:HL-8038

Objective:- to study digital to analog converter using r-2r network.


Features:- instrument comprises of dc regulated power supply 5vdc/150ma, ±15vdc/150ma, 1 voltmeter, 4 SPDT switches, provided for selecting logic '1' & logic '0', one output indicators, circuit diagram printed on the front panel.





Digital To Analog Converter Using R-2r Network

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Ic Regulated Power Supply 0-15 V - 2 Amp.

Item Code:HL-8039

Single Channel Continuously Variable DC Regulated Power Supplies with two meters.

a) 0-15VDC/1Amp.
b) 0-30VDC/1Amp.
c)  0-30VDC/3Amp.
d) 0-30VDC/10Amp.
e) 0-60VDC/2Amp.
f)  0-300VDC/100mA.
g)  0-300VDC/1Amp.
h)  0-15VDC/2Amp.
i)   0-30VDC/2Amp.
j)   0-30VDC/5Amp.
k)  0-60VDC/1Amp.
l)   0-60VDC/5Amp.
m) 0-300VDC/500mA.
n)  0-500VDC/100mA



Ic Regulated Power Supply 0-15 V - 2 Amp.

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SCR Characteristic Apparatus With Regulated Power Supply

Item Code:HL-8040

Objective:- to plot anode current vs anode cathode voltage characteristics. Gates characteristics (open gate), gate charcteristics (gate connected).

Features:- instrument comprises of two dc regulated power supplies 0-30vdc/150ma & 0-1vdc/150ma, three round meters for voltage & current measurement, scr 2p4m mounted behind the panel, connections of supplies, meters & scr brought out at 4mm sockets.



SCR Characteristic Apparatus With Regulated Power Supply

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Study Of Instrumentation Amplifier

Item Code:HL-8041

Objective:- calculate the voltage gain of instrumentation amplifier and draw a curve between v & ar.

Features:- instrument comprises of one ± 12vdc regulated power supply, 2dc regulated short circuit and overload protected continuously variable power supplies, 3 no. Ic 741 placed inside & connections brought out at sockets. One potentiometer and combination of resistances placed on the front panel.  



Study Of Instrumentation Amplifier

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Desauty Bridge

Item Code:HL-8043

It is a simple form of bridge giving maximum accuracy while comparing capacitance in term of resistance. Three decade dials x10, x100 and 1000 ohms from one arm. The other arm has also decade dials x10, x100 and 1000 ohms. A special morse key is fitted in the centre of the two arms connecting the battery and the galvanometer. The connection are engraved on the panel which is fitted to a teak wood polished case. All the coils are calibrated on imported testing bridge. Accuracy ± 0. 5 to 1%.

De- sauty bridge's

It is a simple form of bridge giving maximum accuracy while comparing capacitance in term of resistance. Three decade dials x10, x100 and 1000 ohms from one arm. The other arm has also decade dials x10, x100 and 1000 ohms. A special morse key is fitted in the centre of the two arms connecting the battery and the galvanometer. The connection is engraved on the panel which is fitted to a teak wood polished case. All the coils are calibrated on imported testing bridge. Accuracy ± 0. 5 to 1%.

 

 





Desauty  Bridge

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Resistances In Series And Parallel Apparatus

Item Code:HL-8044

Objective:- to verify properties of resistance when connected in series & parallel.

Features:-

Instruments comprises of two moving coil meters to measure voltage & current,circuit diagram for series & parallel connections printed & resistances mounted on the front panel.



Resistances In Series And Parallel Apparatus

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Battery Eliminator

Item Code:HL-8045

Standard model     output voltage/current

a)    Battery eliminator        2-6v dc/1 amp
b)    Battery eliminator        2-6v dc/2 amp 
c)    Battery eliminator        2-6v dc/3 amp 
d)    Battery eliminator        2-12v dc/1 amp
e)     Battery eliminator        2-12v dc/2 amp 
f)     Battery eliminator        2-12v dc/3 amp
g)    Battery eliminator        2-12v dc/5 amp
 



Battery Eliminator

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Battery Eliminator

Item Code:HL-8046

 Standard Model     Output Voltage/Current

A)    Battery Eliminator        2-6V DC/1 Amp
B)    Battery Eliminator        2-6V DC/2 Amp 
C)    Battery Eliminator        2-6V DC/3 Amp 
D)    Battery Eliminator        2-12V DC/1 Amp
E)     Battery Eliminator        2-12V DC/2 Amp 
F)     Battery Eliminator        2-12V DC/3 Amp
G)    Battery Eliminator        2-12V DC/5 Amp
 



Battery Eliminator

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Battery Eliminator

Item Code:HL-8047

Standard model output voltage/current

a)    Battery eliminator        2-6v dc/1 amp
b)    Battery eliminator        2-6v dc/2 amp 
c)    Battery eliminator        2-6v dc/3 amp 
d)    Battery eliminator        2-12v dc/1 amp
e)     Battery eliminator        2-12v dc/2 amp 
f)     Battery eliminator        2-12v dc/3 amp
g)    Battery eliminator        2-12v dc/5 amp
 



Battery Eliminator

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Battery Eliminator

Item Code:HL-8048

     Standard model     Output volatge/current

a)    Battery eliminator        2-6v dc/1 amp
b)    Battery eliminator        2-6v dc/2 amp
c)    Battery eliminator        2-6v dc/3 amp
d)    Battery eliminator        2-12v dc/1 amp
e)     Battery eliminator        2-12v dc/2 amp
f)     Battery eliminator        2-12v dc/3 amp
g)    Battery eliminator        2-12v dc/5 amp.





Battery Eliminator

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Potentiometers

Item Code:HL-8053

 HLSI-  19164
Range
0 to+ 1999.9mV
Resolution 1 mV
Repeatability + 1 mV
Accuracy + 1 mV +digit
Input Impedancy 10 ohms
Operating Temperature 10 to 50oC
Display 3 1/2 Digit 0.5 seven segment LED display Indication
Power 230V + 10?, 50Hz
Dimensions 76 x 275 x 170 mm.
Weight 2 Kg (approx.)
Standard Accessories
Electrode 2 Nos.
Dust Cover 1 No.
Electrode Stand 1 No.
Manual 1 No




Potentiometers


Water And Soil Analysis Kit

Item Code:HL-8063

  • 3 1/2 digit LCD display
  • mains cum battery operated
  • measures ph, mv, conductivity
  • tds, do, temperature & turbidity
  • housed in vip briefcase

  • model

     

    hlsi-19195   hlsi-19196  hlsi-19197 
    ph range 0 to 14ph 0 to 14ph 0 to 14ph
    temp. Comp. 0oc (manual) 0oc (manual) 0oc (manual)
    resolution 0. 01ph 0. 01ph 0. 01ph
    accuracy +0. 01 ph +0. 01 ph +0. 01 ph
    o. R. P. /mv range n. A. 0 to + 1999 mv 0 to + 1999 mv
    resolution 0. 01ph n. A. 1 mv
    accuracy n. A. + 1 mv + 1 digit + 1 mv + 1 digit
    conductivity range 1 5 5
    cell constant 0. 4 - 1. 5 adj 0. 4 - 1. 5 adj 0. 4 - 1. 5 adj
    resolution 0. 1 micro mhos 0. 1 micro mhos 0. 1 micro mhos
    accuracy + 0. 5% fs + 0. 5% fs + 0. 5% fs
    temperature range 0o - 100oc 0o - 100oc 0o - 100oc
    resolution 0. 1oc 0. 1oc 0. 1oc
    accuracy +0. 1oc + digit +0. 1oc + digit +0. 1oc + digit
    t. D. S. range 1 5 5
    cell constant 0. 4 - 1. 5 adj 0. 4 - 1. 5 adj 0. 4 - 1. 5 adj
    resolution 0. 1ppm 0. 1ppm 0. 1ppm
    accuracy +5% fsd +5% fsd +5% fsd
    d. O. range 0-20 ppm 0-20 ppm n. A.
    temp. Comp. 0. 1 ppm 0. 1 ppm n. A.
    resolution +0. 3 ppm +0. 3 ppm n. A.
    accuracy 5o to 50o (manual) 5o to 50o (manual) n. A.
    turbidity range 0-1000 ntu/jtu n. A. n. A.
    resolution 1 ntu/jtu n. A. n. A.
    display selenium photocell 3 1/2 digit lcd display
    power suppy 6. 8v, 300ma 1. 5v x 6 dry cells or 230v + 10% 50 hz
    accessories 230v + 10% and in-built battery ph combination electrode, conductivity / tds cell, do probe,
    temp probe, standard solution, d. O. Memberanes,
    cell container & instruction manual




    Water And Soil Analysis Kit

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    Microprocessor Trainer

    Item Code:8085

    8085 Microprocessor trainer
    Product description

    1.  8085 cpu operating at 6. 144 mhz
    2. rs-232c interface & usb interface (optional)
    3. 25/28 keyboard & 7-segment display
    4. eprom

    Specifications for hlsi-8501p

     

    a. ) based on 8085 cpu  operating at 6. 144   mhz crystal frequency.

    b. ) 8k bytes of  eprom loaded with   powerful monitor program.

    c. )     8k bytes of ram available to the user

    d. )     total on board memory expansion upto   64k bytes using 2732/2764/27128/6264/   62256 with 1 socket of 28 pin.

    e. )     memory mapping definable by the user.

    f. )     16 bit programmable  timer/counter   using 8253.

    g. ) 24 programmable  i/o lines provided   through 8255.

    h. )     rs-232c  interface through sid/sod   lines with auto baud  rate.

    i. )     two modes of commands:
           i)      hex key pad mode 
            ii)     serial mode

    j. )     all address, data & control lines are   buffered and made available at the   edge connector as per std bus   configuration.

    k. )   25/28 key hexadecimal keyboard  and six   seven segment  displays through 8279.

    l. )     powerful  software  commands like   relocate, string, fill, insert, delete, block move, examine/compare   memory, examine register,insert data, delete data, single step, go, break   point           in both serial & keyboard mode.

    m. )     facility for  downloading/uploading files from/to pc.

    o. )     in-built power supply
    p. )      user's manual.





    Microprocessor Trainer

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    Study Of 4 Bit Ripple Counter (Forward & Reverse)

    Item Code:HL-8069

    Study of 4 Bit Ripple Counter(Forward & Reverse)

    Objective:-
                     
    To verify truth tables of 4 Bit Forward & Reverse counters using 4 'JK' Flip Flops.

    Features:-
                      Instrument comprises of DC Regulated Power Supply 5VDC/150mA, 1Hz monoshot clock pulse, two output indicators, Circuit diagram for 4 'JK' Flip-Flops are printed & connections for input and outputs brought out at the sockets on the front panel.



    Study Of 4 Bit Ripple Counter (Forward & Reverse)

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    Study of Left, Right & Programmable Shift Register

    Item Code:HL-8070

    Study of left, right & programmable shift register

    Objective:-

                 To study & verify truth table of left,right & programmable shift register using IC7495.

    Features:-
                     Instrument comprises of DC regulated power supply 5VDC/150mA,4 SPDT switches provided for selecting logic '1' & logic '0', 1Hz monoshot clock pulse, four output indicators, Circuit diagram for IC7495 printed and two switches for serial input & Mode control.



    Study of Left, Right & Programmable Shift Register

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    Auto Transformer

    Item Code:HL-8071

    Product description:
    Continuously variable voltage auto transformer, protected type. Comprises a tordially wound transformer with a continuously variable output voltage 0-260 volts A.C. steplessly under full load. Input 220-240 Volts A.C. 50 Hz. In stout metal case mounted on a metal base with two output terminals. Single phase with mains cable.



    Auto Transformer


    Function Generator

    Item Code:HL-8072

    Description:

     Function generator offers excellent waves shape, signal linearity, waveform symmetry and frequency range from 1Hz-100 KHz.
    Selection of sine, square and triangle wave and amplitude variable from 0 to 10 V
    The instrument is designed using easy obtainable parts which present trouble free service.

    Specifications:

    Frequency rang 1Hz-100 KHz in 5 steps
    Functions sine, square and triangle
    Frequency Indication dial
    Accuracy better than +- 5%
    Amplitude up to 10V P-P open circuit
    Output impedance 600 ohms






    Function Generator


    Callender & Griffith's Bridge Dial Type

    Item Code:HL-8074

    'Physilab' callender & griffith's bridge dial type  :- this instrument is an improvement over the student's potentiometer. The 50 cms long side wire of 1 ohm resistance is calibrated into 100 parts to facilitrate calculations. 14 coils are arranged in series in dial from each being of 1 ohm resistance. Accuracy of adjustment 0. 1% a 2 volts accumulator through a rheostat and key should be connected to terminal p1 to p2 and the p. D. To be balanced on it. The value of potential gradient can be found by standardising it through a galvanometer connected to g. C. The value of potential gradient can be found standardising it against a standard cell, and thus it can be made direct reading. Imported testing bridge



    Callender & Griffith's Bridge Dial Type

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    Dielectric Constant Apparatus

    Item Code:HL-8080

    To calculate dielectric constant of solids.
    The instrument consists of high Frequency R.F. Oscillator of 8MHz. of
    tuneable Frequency with a Gang Condenser Optimum Resonance
    point is indicated on meter.
    The change in meter reading after placing dielectric material between
    parallel plates can be detected and difference can be  noted for
    calculation.



    Dielectric Constant Apparatus

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    Vacuum Tube Volt Meters- V.T.V.M

    Item Code:HL-8076

    'Physi Lab' V.T.V.M.

    Workable on 220 V 50 Hz compiled in steel cabinet, rectangular meter 110x90mm.

    Suitable for measurement of A.C. / D.C., Resistance 0-1000M. Ohms in seven ranges R.F. 0.50 Volts R.M.S. in 4 ranges.

    D.C. Range : 1.5, 5, 15, 150, 500, 1500 FS-D.

    A.C. Range : 1.5, 5, 15, 50, 150, 500, 1500 F.S.D.

    Resistance : 1K, 10K, 100K, 1M, 10M, 100M, 1000M.





    Vacuum Tube Volt Meters- V.T.V.M

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    Digital Oscilloscope

    Item Code:HL-8078

    Fully Solid state workable on 220 volts 50 Hz. All supplies are stabilized for accurate and stable operation. Single beam with a band width DC to 10 MHz. The accurate triggering of time base enable clear and stable display on screen 8x8 cm. Verticaldeflection can be selected for either A.C. or D.C. provision or attenuation in the input circuit, calibrated from 5 mV to 50V/cm.

    Specifications :
    Band width  Vertical D.C. to 10 MHz (3db)
    Sensitivity 10mV/Cm Maximum
    Input Impedance 1 M Ohm.
    Square wave calibration 2 VP-P.
    Triggering Internal fromverticalamplifier or external.
    Sweep Time Factor 0.1 us/Div. 0.1s/div. ±5%.
    Horizontal Amplifier :
    Band width DC to 1 MHz.
    Display 8x8 cm square
    Power requirement 25 Watt 230 V 50 Hz.
    Dimension 8"x5½"x11"





    Digital Oscilloscope


    Transformers

    Item Code:HL-8079

    This transformers transfer the voltage from the primary winding to the secondary winding with the help of magnetic field. Supplied with 220 volts, 12 volts and 6 volts.




    Transformers


    Linear IC Trainer

    Item Code:HL-8084

    We are offering Linear IC Trainer 

    Brief Features : 

    1. DC regulated power supplies Fix +- 12V/250mA, Variable 0 to +- 5 V/250mA 
    2. Sine wave oscillator of 1 KHz at 0.5 V p-p is built in 
    3. Functional diagram of IC 741 with input point is printed on board. Additional 8 pin IC base with machine pins is provided for putting any other IC of choice 
    4. Digital voltmeter 0-20 V DC 1 no 
    3.1/2 digit, LCD display, mains operated. 
    5. Assorted values of resistance 11No. 100, K, 3.3 K, 5K, 10K, 22K & 100 K ohms 
    6. Assorted value of capacitances 3 No 0.1, 1, & 10 uF 
    7. potentiometer 10 K ohm, Linear V 1 No 
    8. 2mm inter-connection leads 10 No 
    9. Toggle switch with selection of input or output V is provided. 
    10. Comprehensive USERS manual for performing 10 experiments on OP-AMP. 



    Linear IC Trainer


    Diode Valve Characteristic Apparatus With DC Power Supply

    Item Code:HL-480

    Diode valve characteristic apparatus with DC regulated power supply objective:- VL characteristics of diode valve at various filament voltage. features:- instrument comprises of DC regulated power supply 0-300VDC/30MA, AC power supply 6. 3VAC/1amp. Two round meters for voltage & current measurement, valve diagram is printed on front panel, connections of supplies & valve brought out at 4mm socket.



    Diode Valve Characteristic Apparatus With DC Power Supply

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    Tetrode/Pentode Valve Characteristics Apparatus

    Item Code:HL-482

    Tetrode/Pentode Valve Characteristics Apparatus with DC Regulated Power SuppliesObjective:- Plate & Screen Characteristics of Tetrode & Pentode Valve at grid volatges.Features:- Instruments comprises of Two DC regulated power supplies 0-300VDC/30mA & One 0-25VDC/10mA, AC Power Supply 6.3 VAC/1Amp. five round meters for voltages & current measurement, valve diagram is printed on Front Panel, connections of Supplies & valve brought out at 4mm socket.



    Tetrode/Pentode Valve Characteristics Apparatus

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    Ionization Potential Of Mercury Using Thyratron Valve 2d21

    Item Code:HL-483

    Ionization Potential of Mercury using Thyratron valve 2D21Objective:- To draw Vl characteristics of Thyratron valve & calculate its Ionization Potential.Features:- Instrument comprises of DC regulated power supply 0-15VDC/150mA & AC power supply 6.3 VAC/1Amp, two round meters for voltage & current measurement, valve diagram is printed on front panel, connection of supplies and valve brought out at 4mm sockets.



    Ionization Potential Of Mercury Using Thyratron Valve 2d21

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    Thyratron Valve Characteristics Apparatus

    Item Code:HL-484

    Thyratron Valve Characteristics Apparatus using Thyratron Valve 2D21 Objective:- To draw VI characteristics of Thryatron valve at various Grid Voltage. Features:- Instrument comprises of two Dc regulated power supplies 0-5VDC/150mA, 0-15VDC/150mA, AC power supply 6.3VAC/1Amp. three round meters for voltage & current measurement, valve diagram is printed on front panel, connections of supplies & valve brought out at 4mm sockets.



    Thyratron Valve Characteristics Apparatus

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    'H' Parameters Of PNP Transistor In Common Emitter Mode

    Item Code:HL-488

    'H' Parameters Of PNP Transistor In Common Emitter Mode Objective:- Calculation of 'H' Parameters such as current gain, Input Impedance Output Impedance and reverse feedback ratio. Features:- Instrument comprises of Two DC Regulated Power Supplies 0-10VDC/150mA, 0-1VDC/150mA, round meters for voltage & current measurement, one PNP & one NPN Transistor mounted behind the panel, connection of supplies & transistors brought out at 4mm sockets.



    'H' Parameters Of PNP Transistor In Common Emitter Mode

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    Semiconductor Diode/PN junction Diode Apparatus

    Item Code:HL-493

    Semiconductor diode/PN junction diode characteristics apparatus with regulated Power Supplies objective:- To study forward & reverse characteristics of PN Junction Diode.features:- Instrument comprises of Two DC regulated power supplies 0-3VDC/150mA & 0-30VDC/150mA, two round meters for voltage & current measurement, PN Junction Diodes mounted behind the panel, connections of supplies, meters & Diodes brought out at 4mm sockets.



    Semiconductor Diode/PN junction Diode Apparatus

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    Semiconductor Diode/PN junction Diode

    Item Code:HL-494

    Semiconductor Diode/PN Junction Diode Characteristics Apparatus same as HL-493 but with four round meters.



    Semiconductor Diode/PN junction Diode

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    Voltage Stabilization Characteristics Of Zenear Diode

    Item Code:HL-495

    Voltage Stabilization Characteristics of Zenear Diode (without Load Resistances)Objective:- To study input voltage Vs output voltage characteristics & Output voltage Vs Load Characteristics.Features:-  Instrument comprises of 1DC Power Supply, two round meters to measure input voltage & output voltage, one Zener Diode mounted behind the panel & connections brought out at terminals 6mm sockets.



    Voltage Stabilization Characteristics Of Zenear Diode

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    Voltage Stabilization Characteristics Of Zenear Diode

    Item Code:HL-496

    Voltage stabilization characteristics of zenear diode (with built in a load resistance)



    Voltage Stabilization Characteristics Of Zenear Diode

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    Voltage Stabilization Characteristics Of Zenear Diode

    Item Code:HL-497

    Voltage Stabilization Characteristics of Zenear Diode Same as HL-495 but with built in load resistances selectable using band switch.



    Voltage Stabilization Characteristics Of Zenear Diode

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    UJT Characteristics Apparatus With Regulated Power Supplies

    Item Code:HL-503

    UJT characteristics apparatus with regulated power supplies & round meters objective:- to plot v-i characteristics & to measure interbase resistance. features:- instrument comprises of two dc regulated power supply 0-15vdc/150ma & 0-25vdc/150ma, three round meters for voltage & current measurement, one ujt 2n 2646 mounted behind the panel, connections of supplies, meters & ujt brought out at 4mm sockets.



    UJT Characteristics Apparatus With Regulated Power Supplies

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    Mosfet Characteristics Apparatus

    Item Code:HL-504

    Mosfet Characteristics Apparatus With Regulated Power Supplies & Round Meters Objective:- To plot VDS Versus ID for different values of VGS. Features:- Instrument comprises of Two DC regulated power supply 0-15VDC/150mA & 0-25VDC/150mA, three round meters for voltage & current measurement, one Mosfet no. TRF 840 mounted behind the panel, connections of supplies, Meters & Mosfet brought out at 4mm sockets.



    Mosfet Characteristics Apparatus

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    Characteristics & Appliances of Basic Thyristors

    Item Code:HL-505

    Characteristics & Appliances Of Basic ThyristorsObjective:- To study characteristics & Applications of Diac, Triac, UJT & SCR. Features:- Instruments comprises of three DC regulated power supplies 0-15VDC/150mA, 0-50VDC/150mA & 0-25VDC/150mA, four round dual range meters for voltage & current measurement, UJT, SCR, Diac, Triac & their supportive components mounted behind the panel, connections of supplies, Meters & components brought out at 4mm sockets.



    Characteristics & Appliances of Basic Thyristors

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    DIAC Characteristics Apparatus With Two Meter

    Item Code:HL-506

    DIAC Characteristics Apparatus With Two Meters & Regulated Power Supply Objective:- To study VI characteristics of DIAC. Features:- Instrument comprises of DC Regulated Power Supply 0-50VDC/150mA, two round meter for voltage & current measurement, one DIAC mounted behind the panel, connections of supplies & DIAC brought out at 4mm sockets.



    DIAC Characteristics Apparatus With Two Meter

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    Triac Characteristics Apparatus With Regulated Power Supply

    Item Code:HL-507

    Triac Characteristics Apparatus with Regulated Power Supplies Objective:- To study the MT Characteristics with Gate Signal in all the 4 Quadrants.Features:- Instrument comprises of Two DC Regulated Power Supplies 0-15VDC/150mA & 0-5VDC/150mA, three round meters for voltage & current measurement Triac mounted behind the panel, connections of Supplies & Triac brought out at 4mm sockets.



    Triac Characteristics Apparatus With Regulated Power Supply

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    LED Characteristics Apparatus

    Item Code:HL-509

    LED Characteristics Apparatus Objective:- To study V-I characteristics of a LED. Features:- Instruments comprises of DC regulated power supply 0-3VDC/150mA, two round meters for voltage & current measurement, LED mounted on the panel connections of supplies & LED brought out at 4mm sockets.



    LED Characteristics Apparatus

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    Characteristics Of OPTO Electronic Devices

    Item Code:HL-510

    Characteristics Of OPTO Electronic Devices Objective:- To study VI characteristics of Photo transistor, Photo Diode & LED. Features:- Instrument comprises of DC regulated power supply 0-3VDC/150mA, Two round meter for voltage & current measurement, photo transistor, photo diode & LED mounted on the panel,connections of supplies, meters & components brought out at 4mm sockets. Lamp holder with 60W Bulb are given with this apparatus



    Characteristics Of  OPTO Electronic Devices

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    Photo Transistor Characteristics Apparatus

    Item Code:HL-512

    Photo Transistor Characteristics Apparatus Objective:- To plot a graph, Current VS Intensity of light at different Value of Voltage.Features:- Instruments comprises of DC Regulated Power Supply 0-3VDC/150mA, Two round meters for volateg & current measurement, Photo Transistor mounted on the panel, connections of supplies & Photo Transistor brought out at 4mm sockets. Lamp holder with 60W Bulb are given with this apparatus.



    Photo Transistor Characteristics Apparatus

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    Scientific Instrument

    Item Code:HL-513

    Resistivity of semiconductors by four Probe Method at Different Temperatures & Determinaton of Band-GapObjective:- The experiment consists of the following accessories for four probe arrangement, oven (Upto 200°C), Germanium Crystal mounted, Thermometer (0-200°C), four probe setup, constant current power supply,Digital Electronic Millivoltmeter of range 200mV. Display 3½digit 7 segment LED




    Scientific Instrument

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    Solar Cell Characteristics Apparatus

    Item Code:HL-514

    Solar Cell Characteristics Apparatus Objective:- To draw V & I Characteristics of Solar Cell.Features:- Instrument comprises of moving coil meters fitted on panel with power supply, Lamp house with power supply, solar cell mounted, optical bench double rod & connections leads.



    Solar Cell Characteristics Apparatus

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    Susceptibility Or FeCl3 Solution/Quinck's Tube Method

    Item Code:HL-515

    Susceptibility or FeCl3 Solution/Quinck's Tube MethodTo study Susceptibility of FeCl3 Solution in strong magnetic field, complete apparatus consisting of electrimagnet of 7.5Kg strength with its Power Supply 0-100V variable 6Amps. Digital Gauss Meter 0-20K Gauss. Graduated Quinck's Tube with wooden stand.



    Susceptibility Or FeCl3 Solution/Quinck's Tube Method

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    Ultrasonic Diffraction Grating Experiment

    Item Code:HL-516

    Ultrasonic Diffraction Grating Experiment (To Determine Velocity of Ultrasonic Wave)Ultrasonic Interferometer complete apparatus with R.F. Oscillator 3-8Mhz,, Crystal with tank, specially design Spectrometer, Sodium lamp with Transformers & wooden Box



    Ultrasonic Diffraction Grating Experiment

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    Dual Trace Oscilloscope

    Dual Trace OscilloscopeUsed in engineering institutions and universities, our range of Dual Trace Oscilloscopes can be customized to meet the exact specifications of the customers. These Oscilloscopes are light in weight, portable instruments that are compact enough to be easily carried by a single person. Further, our products can be availed at economical prices as per the requirements of the clients.
     
      GENERAL DESCRIPTION

    These 20MHz Oscilloscope are dual- channel oscilloscope with maximum sensitivity of 1 mV/DIV. The time base provides a maximum sweep time of 0.2 mS/DIV. When magnified by 10, the sweep speed is 20nS/DIV. These oscilloscope employ a 6-inch rectangular type TOSHIBA cathode-ray tube with red internal graticule.
    These oscilloscopes are sturdy, easy to operate and exhibit high operational reliability.

    FEATURES

     High luminance, internal graticule Toshiba CRT

     Japanese electronic encoder, light handy and reliable
     Fully sealed long live vertical mode switch
     ALT Triggering Function. Two independent signals simultaneous observation.
     Triggering Level Lock Function, Automatic Synchronize Function.
     Built-in 6 Digit Frequency Counter.(available in model KM - 20 - 20 )
     High intensity CRT with high acceleration voltage :
       The CRT is a high beam transmission, high intensity type with a high acceleration voltage of 2KV. It    displays clear readable traces even at high sweep speeds.
    The Oscilloscope has a trigger level lock function which makes the triggering adjustment     unnecessary.
    Alternate triggering :
       Even an observation of two waveforms of different frequencies, the waveform of the each channel is    stably triggered.
     TV sync triggering :
       The oscilloscope has a sync separator circuit for triggering of TV-V and TV-H signals.
     CHI Output :
       Terminated 50 output of channel 1 signal available on rear panel for driving frequency counter or    other instruments.
     Z-Axis Input :
      Intensity modulation capability permits time or frequency markers to be added. Trace blank with   positive signal, TTL compatible.
     X-Y operation :
       Set the switch to X-Y. Then the instrument works as an X-Y oscilloscope. CH1 can be applied as    horizontal deflection (X-axis) while CH2 provide vertical deflection (Y-axis).




    Dual Trace Oscilloscope


    Measurement Of Peak, Average & RMS Value Of a AC Signal

    Item Code:HL-532

    Features:- Instrument comprises of Sine Wave Output on sockets, Step Down transformer, Circuit Diagram for Peak & Average Value measurement Printed and connections of important points brought out at Sockets/Terminals.



    Measurement Of Peak, Average & RMS Value Of a AC Signal

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    Verification Of KCL And KVL Electronic Instruments

    Item Code:HL533

    Features:- Instrument comprises of DC regulated power supply 0-3VDC/250mA, two round meters for voltage & current measurement, Combination of resistances mounted on front panel.



    Verification Of KCL And KVL Electronic Instruments

    Large View



    Charging & Discharging Of Condensor

    Item Code:HL-537

    Objective:- To study RC Time constant using various sets of resistance & capacitors.

    Features:- Instrument comprises of Dc Power Supply with selector switch to select different voltages. One Centre Zero Micro ammeter, Circuit diagram is Printed. Terminals are provided for connecting different values of Resistances & capacitor.





    Charging & Discharging Of Condensor

    Large View



    Flashing & Quenching Of Neon Apparatus

    Item Code:HL-538

    Objective:- To calculate charge & discharge time of a condenser.

    Features:- Instrument comprises of High Voltage DC Power Supply 250VDC/30mA, 3 Capacitors(paper Type) connected behind the front panel, can be selected using toggle switches & one Neon Lamp.





    Flashing & Quenching Of Neon Apparatus

    Large View



    Convertion Of Galvanometer Into A Voltmeter

    Item Code:HL-540

    Features:- Instrument comprises of DC Regulated Power Supply 0-5VDC/150mA, two round meters (One Voltmeter & one Galvanometer), Three set of resistances mounted behind the panel, connections of supplies, Meters & Resistances brought out at 4mm Sockets.



    Convertion Of Galvanometer Into A Voltmeter

    Large View



    Convertion Of Galvanometer Into A Currentmeter

    Item Code:HL-541

    Features:- Instrument comprises of DC regulated power supply of 0-5VDC/150mA, Two round meter (One milliammeter & one galvanometer), Three set of shunts mounted behind the panel, connections of supplies, Meters & shunts brought out at 4mm sockets.



    Convertion Of Galvanometer Into A Currentmeter

    Large View



    Convertion Of Galvanometer Into A Voltmeter & Ammeter

    Item Code:HL-542

    Features:- Instrument comprises of Dc regulated Power Supply of 0-5V, Three round moving coil meters (One Voltmeter, One Milliammeter & One Galvanometer). Three shunts, Three resistances are mounted on front panel.



    Convertion Of Galvanometer Into A Voltmeter & Ammeter

    Large View



    LCR Resonance Apparatus

    Item Code:HL-544

    Objective:- To plot frequency Vs. Current Characteristics of LCR circuit when connected in series or in parallel.

    Features:- Instrument comprises of 3 Resistances, 3 capacitors & 1 Inductance connected inside & connections brought out at Sockets. 2 AC moving coil meters to measure voltage & current.





    LCR Resonance Apparatus

    Large View



    LCR Impedence Circuit Apparatus

    Item Code:HL-549

    Objective:- To calculate AC power factor of LCR circuit when connected in series & subjected to AC voltage.

    Features:- Instrument comprises of AC Power Supply 3-15VAc, voltage selectable using band switch, 2 AC moving coil meters to measure voltage & current, 3 Resistance, 3 Capacitors & 1 Inductance connected inside & connections brought out at terminals.

     





    LCR Impedence Circuit Apparatus

    Large View



    RC Cuircuit (Transient Response)

    Item Code:HL-550

    Objective:- To study & plot graph for RC circuit as Low Pass & High Pass filters.

    Features:- Circuit diagram for low Pass, High Pass filters Printed, 3 Resistances 3 capcitors are placed inside and connections brought out at 4mm Sockets.





    RC Cuircuit (Transient Response)

    Large View



    Cliping & Clamping Circuit Apparatus

    Item Code:HL-551

    Objective:- To study effect of Positive & Negative clipping & clamping on sine wave.
    Features:- Instrument comprises of DC Regulated Power Supply 0-3VDC/150mA. Two fix output DC power supplies connected in series OD diodes for positives & negative clipping, Circuit diagram for clipping & clamping circuit printed, components placed inside & connections brought out at 4mm sockets.



    Cliping & Clamping Circuit Apparatus

    Large View



    FET Common Source Amplifier

    Item Code:HL-557

    Objective:- Study of Voltage Gain and Frequency Response of a Common Source Amplifier.
    Features:- Instrument comprises of DC Regulated Power Supply, Circuit diagram is printed, components mounted on the front panel.



    FET Common Source Amplifier

    Large View



    Common Collector (Emitter Follower) Transistor Amplifier

    Item Code:HL-558

    Objective:- To study Frequency Response, Input Impedance & Output Impedance of Common Collector Transistor Amplifier.
    Features:- instrument comprises of DC Regulated Power Supply, Circuit diagram is printed, components mounted on the front panel.



    Common Collector (Emitter Follower) Transistor Amplifier

    Large View



    Common Base Transistor Amplifier (Frequency Response)

    Item Code:HL-559

    Objective:- To study frequency response of common base transistor amplifier.
    Features:- Instrument comprises of DC regulated power supply, circuit diagram is printed, components mounted on the front panel.



    Common Base Transistor Amplifier (Frequency Response)

    Large View



    E/M By Magnatron Method

    Item Code:HL-8025AB

    HL- E/M by Magnatron Method

     

    Objective:-  To study charge of an electron using short solenoid method.
    Features:-
      Kit Comprises of low voltage DC Power supply unit with filament voltage & solenoid current controls. Two meters are provided for anode voltage controls. One solenoid  unit comprises of one solenoid mounted on wooden stand & valve 41 is kept in the solenoid pipe.





    E/M By Magnatron Method

    Large View



    Study Of Left, Right & Programmable Shift Register

    Item Code:HL-8100

    Objective : To study & verify truth table of Left, Right & Programmable Shift Register using IC 7495.
    Features : Instrument comprises of DC Regulated Power Supply 5VDC/150mA, 4 SPDT switches provided for selecting logic ‘1’ & logic ‘0’, 1Hz monoshot clock pulse, four output indicators, Circuit diagram for IC 7495 printed and two switches for serial input & Mode control.



    Study Of Left, Right & Programmable Shift Register

    Large View



    Bulb Holders M.E.S.

    Mounted bulb for easy connections to electrical circuits. Overall dia. 30 mm.

    Bulb Holder M.E.S. Plastic

    Bulb Holder M.E.S. PVC.





    Bulb Holders M.E.S.

    Large View



    Coil Friction Apparatus

    This Coil Friction Apparatus is comprised of an aluminum drum and wooden board that has three frictionless pulleys mounted on it. These pulleys can be adjusted at laps of 3/4th or 1/4th drum circumference. These apparatus is used to distinguish the relation between lap angle, tension and groove geometry. It can be customized as per the client’s requirement and are available at industry leading prices.



    Coil Friction Apparatus


    Metallic Screen Multimeterhot

    Item Code:HL-8083

    * New type holster, streamline design.
    * Large LCD makes the reading clearly.
    * Metallic screen board with Stronger antimagnetic
    and anti-interferential function.
    * Full function protection, anti-high voltage circuit
    design.
    * New type battery case design, it's easy to change battery.The Salicon hand held ST80 3 1/2 digit is compact general purpose Digital Multimeter. Its rugged engineering design with protective holster makes it. Choice for reliable partner in measurements, be at test bench or, at shop floor. ST80 is supplied with Probe as accessory.

    Parameters Range Accuracy
    DC Voltage 200mV/2V/20V/200V/600V
    ±(0.5%-1-4)
    AC Voltages 200V/600V ±(1.2%+10)
    DC Current 2mA/200mA/10A ±(1.5%+3)
    Resistance 20011/2 kiX'20kil 200ktl/20MQ/200MQ
    ±(0.8%+5)
    Battery Testing 1.5V/9V ±(2.5%+2)

    General Characters
    :

    Product Net Weight :
    Approx: 180g

    Product Dimension:
    145x80x28mm

    Standard Accessories:
    Test leads, battery, instruction manual





    Digital Multi Meterhot

    Item Code:HL-8082

    * New type holster, streamline design.
    * Large LCD makes the reading clearly.
    * Metallic screen board with Stronger antimagnetic and anti-interferential function.
    * No power off under natural operation.
    * Full function protection, anti-high voltage circuit design.
    * Restorable fuse protection circuit diagram
    HL Scientific ST82 3 112 digit is compact general purpose Digital Multimeter. Its rugged engineering design with protective holster makes it.
    Choice for reliable partner in measurements, be at test bench or, at shop floor. ST82 is supplied with Probe as accessory.
    Special Function
    Diode test (√)
    Continuity buzzer (√)
    Low battery indication (√)
    Data hold (√)
    Auto power off (√)
    Function protection (√)
    Restorable Fuse protection (√)
    Shock proof protection (√)
    Input impedance (√)
    Sampling rate (√)
    AC frequency response (√)
    Operation way (√)
    Max. Display (√)
    LCD size (√)
    Battery (√)
    Parameter Range Accuracy
    DC Voltage 200mV/2V/20V/200V/1000V
    ±(0.5 % + 4)
    AC Voltages 200mV/2V/20V/200V/750V
    ±1 1,0%+5)









    Lechlanchee Cell

    Lechlanchee Cell

    Item Code:HL-8024

    Lechlanchee cell output voltage 1. 5v.


    Daniel Cell

    Daniel Cell

    Item Code:HL-8026

    Daniel cell output voltage 1. 018 VDC.






    Sodium/Mercury Vapour Lamp Transformer

    Sodium/Mercury Vapour Lamp Transformer

    Item Code:HL-8042


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    Contact Us
    H. L. Scientific Industries
    Mr. Yogesh Goswami / Mr. Yogesh Goswami (CEO)
    No. 175/10, Bank Road, Opposite Power House, Mohan Lal Building, 1st Floor
    Ambala - 133001, Haryana, India

    Contact via E-mail

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