Charge Sensor   Home / SmartQ Sensors  

A replacement for the traditional gold leaf electroscope.

Allows the quantity of charge and polarity to be recorded and not just the presence of charge.

Additionally the sensor can function as a very high resistance (at least 10 to the power of 12 Ohms), accurate voltmeter. Six ranges, 3 for different charge intensities and 3 for voltage. Ideal for measuring charges developed by rubbing acetate, polythene or ebonite rods. 

Teaching applications:
  • Magnitude and sign of the charge on different objects
  • Electrostatic phenomena
  • Simple demonstrations of sign of charge
  • Charge sharing between conductors
  • Faraday’s ice pail investigations
  • Electrostatic shielding
  • Induced charge
  • Charging by induction
  • Density of charge on the surface of a conductor
  • Investigating the relationship ‘Voltage is proportional to the charge on an object’ by adding charges
  • Measuring emf of cells
  • Measuring voltages of half cells
  • Discharge of a capacitor

Not suitable for the direct measurement of Van de Graaff electrostatic generator.


Charge: ±10 nC, ±100 nC, ±220 nC
Voltage: ±0.5 V, ±2 V, ±10 V

Available Resources

Downloads Charge Sensor Manual
Doc No.: DS059 | Issue: 2

Teaching Materials

Adding charges ()
Activity to show that charges can be added to a collecting surface.

View Worksheet Teacher Notes Student Worksheet
Determine the sign of charges ()
Using a charge sensor we can go further than the electroscope and show both the magnitude of the charge and the sign of the charge. A big step up form electroscope work.

View Worksheet Teacher Notes Student Worksheet
Leaking charges ()
We are always told that charges leak away due to the permettivity of air and point discharge loci. But how how much does leak away?

View Worksheet Teacher Notes Student Worksheet
Faradays Ice Pail ()
Investigate the charges on a Faraday's ice pail. Using the Charge sensor you can see magnitude and sign of the charges collected and induced.

View Worksheet Teacher Notes Student Worksheet
Charge from movement ()
Watch charges being built up as you move around! fun activity and also good for explaining how the wrong trousers can create an explosion!

View Worksheet Teacher Notes Student Worksheet
Order No. : 3268

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