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Educational Science & Technology
CONTACT US|Tel: 01525 373666

This SmartQ Charge Sensor has now been discontinued.

Please see our latest wireless version for more information.

Wireless Charge Sensor
Charge Sensor (SmartQ)

Charge Sensor

The Charge sensor can be used in many electrostatic experiments to measure the charge on a source when it’s very small. It can replace a traditional gold leaf electroscope by showing not only the charge polarity (positive or negative) but also the quantity of charge.

In addition the sensor can function as a high-resistance accurate voltmeter to measure the potential difference between two points.

Warranty & Support

All our sensors are supplied with 5 years warranty and lifetime support.

Measuring Charge

The Charge Sensor is a very high impedance voltage sensor which will draw practically no current whilst measuring the potential difference between the ends of an electrical component.

Although the Sensor has over voltage protection of ±40 V, this would not be sufficient to protect from the extremely high voltages created by a Van de Graaff or similar high voltage generator i.e. it is not suitable for the direct measurement of Van de Graaff electrostatic generator.

data harvest charge sensor
data harvest charge sensor
Practical Teaching

The Charge Sensor can be used to investigate a number of scientific experiments such as:

  • 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 e.m.f. of cells
  • Discharge of a capacitor
  • Used as a high impedance voltmeter e.g. measuring the voltage of chemical half cells
Your Purchasing Options

For customers outside of the UK, please contact Data Harvest or an overseas distributor within your country.

Downloads & Resources

All available downloadable product manuals and firmware for the Charge Sensor

Product Manuals

Download Charge Sensor Manual | Version: 3


Ranges 2, Charge and Voltage
Charge Range ±10 nCoulomb (nC), Resolution: 0.01 nC, ±100 nCoulomb (nC), Resolution: 0.1 nC, ±220 nCoulomb (nC), Resolution: 1 nC
Voltage Range ±0.5 V (500 mV), Resolution: 0.001 V, ±2 V, Resolution: 0.01 V, ±10 V,Resolution: 0.01 V
Input impedance 1012 ohms, minimum
Input capacitance 22 nF ±1% (0.022 µF)
Input voltage Range ±10 V
Input over voltage protection up to ±40 V

What's in the box

1x Charge Sensor

Other Information

The Sensor is supplied with a shielded BNC/crocodile lead that ends with a red and black (earth) crocodile clip.