Equipment for demonstration of the quantum properties of the electric charge, as well as to determine the elementary charge. The experiment is easy to perform and suitable for both laboratory and demonstration using the Videoflex camera (765-1000). With the equipment, the elemental charge can be determined in 3 ways: change of charge by means of an alpha radiator, falling and rising speed with constant capacitor voltage and free voltage and falling speed without electric field.

The oil droplets are sprayed into the condenser chamber which is illuminated by a built-in halogen lamp, bright enough to enable observation with the Videoflex camera.