Thank you for purchasing the Smart Wireless Charge Sensor. We pride ourselves on producing high quality products that meet with the demands of the busy classroom environment. If you have any problems using this sensor, please read this documentation in full before contacting the Data Harvest support team. 


The Smart Wireless Charge Sensor is USB and Bluetooth compatible. Using Bluetooth, a sensor can connect to mobile devices, tablets, laptops, and desktops. 

The Charge sensor can measure the amount of charge on a source where the charge available is very small e.g. as in many electrostatic experiments. It can replace a traditional gold leaf electroscope by showing not only the polarity of the charge but also performing quantitative measurements. It can also measure the potential difference between two points.

The Charge sensor has an input capacitor connected in parallel across the input terminals to a voltage amplifier. An applied charge will charge the input capacitor resulting in a rise in the magnitude of the voltage across the capacitor. The sensor will use the value of the potential difference across the capacitor to calculate the charge (nC) or voltage (V). 

The Charge sensor is, additionally, a very high impedance voltage sensor, (at least 1 tera ohms (1012 ohms)), which will draw practically no current whilst measuring the potential difference between the ends of an electrical component.

The sensor is supplied with a shielded BNC to crocodile lead. This lead should not be substituted by another manufacturer’s lead, which could give false results. The lead ends with a red and black (earth) crocodile clip.