How Capacitive Touch Sensors Work. It's called capacitive because the technology is based on capacitive coupling that detects anything that is conductive or has a dielectric different from air. In this case, the human body (your fingers) is being used as an electrical charge conductor.

How accurate are capacitive sensors?

Completely non-contact capacitive position measurement - the most accurate electrical sensing technology available. Detection of any conductive, grounded target – surface finish or material have no effect on accuracy. Optimized for short measurement ranges –10 micrometers up to 4 millimeters, depending upon sensor size.

What are the disadvantages of capacitive sensor?

Following are the disadvantages of Capacitive sensor: ➨It is very much sensitive to changes in environmental conditions such as temperature, humidity etc. This will affect the performance. ➨The measurement of capacitance is hard compare to measurement of resistance.