H. L. Scientific Industries
Bank Road, Ambala, Haryana
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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.

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'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".



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  • Item Code: HL-8077
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Objective:- To study voltage multiplication using diodes. Resistance & capacitors.

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

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  • Item Code: HL-8008
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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
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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


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  • Item Code: HL-677
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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

 

 

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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.
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  • Item Code: HL-8002
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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.
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  • Item Code: HL-8003
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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.
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  • Item Code: HL-8006
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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.

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  • Item Code: HL-8007
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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.

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  • Item Code: HL-8010
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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.

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  • Item Code: HL-8012
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Objective: To verify the Truth Table of Digital Half Adder, Half Subtractor, Full Adder & Full Subtractor.

Features: Study Of Adder And Subtractor 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.

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  • Item Code: HL-8013
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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.

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  • Item Code: HL-8014
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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.

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  • Item Code: HL-8015
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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.  

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  • Item Code: HL-8017
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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.

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  • Item Code: HL-8018
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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.
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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 .

 


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  • Item Code: HL-8021
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Lechlanchee cell output voltage 1. 5v.
Additional Information:
  • Item Code: HL-8024
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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. 


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  • Item Code: HL-8025
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Daniel cell output voltage 1. 018 VDC.


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  • Item Code: HL-8026
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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'.

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  • Item Code: HL-8027
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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.

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  • Item Code: HL-8028
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Objective:- to study forward & reverse characteristic of zener diode.
features:- instruments comprises of two dc power supplies,two round meters to measure for voltage & current, 1 zener diode mounted behind the panel & connections brought out t terminals/sockets.

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  • Item Code: HL-8029
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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.

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  • Item Code: HL-8030
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Sodium vapour lamp transformer are housed in iron cabinet and nicely painted.

a)         35 watt
b)         55 watt


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  • Item Code: HL-8033
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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 %
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  • Item Code: HL-8034
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  1. 0-15vdc/1amp. With one moving coil 72mm acrylic square voltmeter
  2. 0-15vdc/2amp. With one moving coil 72mm acrylic square voltmeter.

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  • Item Code: HL-8036
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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.


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  • Item Code: HL-8038
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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

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  • Item Code: HL-8039
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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.

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  • Item Code: HL-8040
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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.  

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  • Item Code: HL-8041
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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%.

 

 


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  • Item Code: HL-8043
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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.

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  • Item Code: HL-8044
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  • 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

    Additional Information:
    • Item Code: HL-8063
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    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

    1. based on 8085 cpu  operating at 6. 144   mhz crystal frequency.
    2. 8k bytes of  eprom loaded with   powerful monitor program.
    3. 8k bytes of ram available to the user
    4. total on board memory expansion upto   64k bytes using 2732/2764/27128/6264/   62256 with 1 socket of 28 pin.
    5. memory mapping definable by the user.
    6. 16 bit programmable  timer/counter   using 8253.
    7. 24 programmable  i/o lines provided   through 8255.
    8. rs-232c  interface through sid/sod   lines with auto baud  rate.
    • two modes of commands:
    • hex key pad mode 
    • serial mode
    1. All address, data & control lines are   buffered and made available
    2. at the   edge connector as per std bus   configuration.
    3. 25/28 key hexadecimal keyboard  and six   seven segment
    4. display through 8279.
    5. Powerful  software  commands like   relocate, string, fill, insert,
    6. delete, block move, examine/compare   memory, examine
    7. register, insert data, delete data, single step, go, break   point
    8. in both serial & keyboard mode.
    9. Facility for downloading/uploading files from/to pc.
    10. In-built power supply 
    11. User's manual

    Additional Information:
    • Item Code: 8085
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    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:-
    Study Of 4 Bit Ripple Counter 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.

    Additional Information:
    • Item Code: HL-8069
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    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.

    Additional Information:
    • Item Code: HL-8070
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    '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
    Additional Information:
    • Item Code: HL-8074
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    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.

    Additional Information:
    • Item Code: HL-8080
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    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"


    Additional Information:
    • Item Code: HL-8078
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    Product Details:
    Cooling TypeDry Type/Air Cooled
    Input Voltage220 Volts
    Output Voltage415 Volts
    PhaseSingle Phase, Three Phase
    Power (VA)2.5 Kw
    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.
    Additional Information:
    • Item Code: HL-8079
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    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.
    Additional Information:
    • Item Code: HL-482
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    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.
    Additional Information:
    • Item Code: HL-483
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    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.
    Additional Information:
    • Item Code: HL-484
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    '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.
    Additional Information:
    • Item Code: HL-488
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    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.
    Additional Information:
    • Item Code: HL-495
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    Voltage stabilization characteristics of zenear diode (with built in a load resistance)
    Additional Information:
    • Item Code: HL-496
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    Voltage Stabilization Characteristics of Zenear Diode Same as HL-495 but with built in load resistances selectable using band switch.
    Additional Information:
    • Item Code: HL-497
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    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.
    Additional Information:
    • Item Code: HL-503
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    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.
    Additional Information:
    • Item Code: HL-504
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    DIAC Characteristics Apparatus With Two Meters & Regulated Power Supply Objective:- To study VI characteristics of DIAC. Features:- DIAC Characteristics Apparatus With Two Metercomprises 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.
    Additional Information:
    • Item Code: HL-506
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    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.
    Additional Information:
    • Item Code: HL-507
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    LED Characteristics Apparatus Objective:- To study V-I characteristics of a LED. Features:- LED Characteristics Apparatus 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.
    Additional Information:
    • Item Code: HL-509
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    Characteristics Of OPTO Electronic Devices Objective:- To study VI characteristics of Photo transistor, Photo Diode & LED. Features:- Characteristics Of  OPTO Electronic Devices 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
    Additional Information:
    • Item Code: HL-510
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    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

    Additional Information:
    • Item Code: HL-513
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    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.
    Additional Information:
    • Item Code: HL-514
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    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.
    Additional Information:
    • Item Code: HL-515
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    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).
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    Features:- Measurement Of Peak, Average & RMS Value Of a AC Signal 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.
    Additional Information:
    • Item Code: HL-532
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    Features:-Verification Of KCL and KVL Electronic  Instruments comprises of DC regulated power supply 0-3VDC/250mA, two round meters for voltage & current measurement, Combination of resistances mounted on front panel.
    Additional Information:
    • Item Code: HL533
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    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.


    Additional Information:
    • Item Code: HL-537
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    Objective:- Flashing & Quenching Of Neon Apparatus ia used to calculate charge & discharge time of a condenser.

    Features:- Flashing & Quenching Of Neon Apparatus 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.


    Additional Information:
    • Item Code: HL-538
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    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.
    Additional Information:
    • Item Code: HL-540
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    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.
    Additional Information:
    • Item Code: HL-541
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    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.
    Additional Information:
    • Item Code: HL-542
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    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.

     


    Additional Information:
    • Item Code: HL-549
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    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.


    Additional Information:
    • Item Code: HL-550
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    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.

    Additional Information:
    • Item Code: HL-551
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    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.

    Additional Information:
    • Item Code: HL-557
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    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.

    Additional Information:
    • Item Code: HL-558
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    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.

    Additional Information:
    • Item Code: HL-559
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    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.


    Additional Information:
    • Item Code: HL-8025AB
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    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.

    Additional Information:
    • Item Code: HL-8100
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    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.
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    H. L. Scientific Industries

    Yogesh Goswami (CEO)
    No. 175/10, Bank Road, Opposite Power House Mohan Lal Building, 1st Floor
    Ambala - 133001
    Haryana, India
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