Wireless charge sensor

The CMA Wireless Charge sensor is designed to measures electrostatic charges in three ranges -5 .. +5 nC, -20 .. +20 nC and -100 .. +100 nC.
It can replace a traditional electroscope by not only displaying the charge polarity but also performing quantitative measurements. The sensor comes with a shielded BNC/alligator clip. The cable is supplied with red and black alligator clips.

The wireless charge sensor is equipped with a color OLED display that displays sensor information and measured values. This makes the sensor suitable for use as a standalone measuring instrument.
This charge sensor can be used wirelessly via Bluetooth or wired via USB with the Coach 7 or Coach 7 lite programs/apps on computers (Windows and Mac), Chromebooks, and mobile devices (Android and iOS).

Technical specifications:

• Measuring ranges: ± 5 nC / ± 25 nC / ± 100 nC
• Resolution: 0.003 nC / 0.01 nC / 0.05 nC
• Maximum voltage: ± 150 V
• Input impedance: 1 MO
• Warrantee: 36 months
• OLED display: 0.96” 128 x 64px
• Maximal sampling rate: 10 Hz
• Battery life: 4h when full (rechargeable)
• Connection: Bluetooth 5, Low Energy (Mac, Android, iOS) Bluetooth 2.1, Classic (Windows) or USB-C 2.0

All specifications of the sensor are described it its Product manual.

Suggested physics experiments:

• Measure the electrostatic charge generated by rubbing a balloon on different fabrics
• Compare the charge on a plastic rod after rubbing it with wool versus silk
• Observe how distance affects the charge measured between two objects
• Investigate the charge buildup on a glass rod after repeated rubbing
• Test how grounding an object affects the measured electrostatic charge
• Measure the charge on different materials like PVC, rubber, and acrylic after friction
• Explore charge induction by bringing a charged object near a neutral conductor
• Observe how humidity affects electrostatic charge buildup on a material.