Electroscopes & Electrometer

Pith Ball Electroscope “Long” is perfect for classroom demonstration. It consists of a pair of pith Ball suspended by threads from a U-shaped brass wire mounted on a base with rubber feet.
Height: 30cm.
Base: Acrylic10 x 10cm

For introductory electrostatic experiments and for indication of DC & AC voltages. Suitable for shadow projection. Complete with detachable capacitor plate.
Maximum Voltage : 5kV AC/DC
Diameter : 200mm
Height : 310mm

[A] GOLD LEAF ELECTROSCOPE IN METAL CASE 

The leaves are housed in a metallic case having glass sides to see through. A scale is provided inside.

[B] GOLD LEAF ELECTROSCOPE IN CONICAL FLASK 

It is used for detection of electrostatic charges.

[C] ELECTROSCOPE PITH BALL 

Fitted on base. Total height 15cm.

A gold leaf electroscope is used to detect the presence of charge in electrostatics experiment. Gold leaf is attached by metal plate supported by an insulating bush with a 4mm socket. It consists of a transparent glass front window and ground glass rear window and also consists of a graduated scale ( 0o - 90o).

The electrometer amplifier (gain factor 1) is an impedance transformer with extremely high-resistance voltage input and low-resistance output.
The unit is used with a connected voltmeter to conduct the following measurements:
1. For quasi-static voltage measurement up to 10 V DC.
2. For high-resistance measurement of voltages greater than 10 V with an ohmic voltage divider consisting of resistors module.
3. For quasi-static measurements of voltages greater than 10 V DC with a capacitive voltage divider consisting of capacitors module.
4. For measurement of very small currents using plug-in resistors module up to 10 G ohm as shunts.
5. As a charge meter as low as 10-9A-Sec, with capacitors module from 1000 nF to 1 nF.

Technical Specifications:
Electrometer amplifier is used for charge measurement.
Gain : 1
Input Impedance : >1013 ohm
Input Current : < 0.5pA
Output Voltage : upto +10V
Output Current : 5mA (Short Circuit Protected)
Supply Voltage : 12 V AC