View experiment results on a screen or in a group.
Project your measurements onto a screen for a large group to see with this well-made electroscope. Precision Projection Electroscope have cylindrical metal case has two parallel plane glass windows, both removable, through which you can shine a light for projection. Close fittings and quality materials insulate the leaf system so it says charged for several days in dry whether.
A cost effective instrument
The plastic balls replace the more expensive pitch balls and are slightly more durable but heavier. Balls are threaded stand. Use insulated stand. Use with friction rods or van de graff generators.
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Used to detect electrostatic charge
Available in plain or attached to a light thread about 22 cm long. Coated pitch balls and spheres have light conductive coating used in charge transfer experiments.