Capacitive Relative Humidity Sensor With a polymer capacitive sensor that varies as little as 3% RH, the G-CAP2 offers exceptional interchangeability, so you spend less time on assembly and production calibration. By contrast, some competing capacitive sensors vary by as much as 40% or more. Such wide variances require time-consuming calibration that affects manufacturing costs and cycle time.

For customers with calibration capabilities, an economical, uncalibrated version of the G-CAP2 is offered in various capacitance ranges. Otherwise, the G-CAP2 comes factory-calibrated to within ±1 picofarad (pf), for relative humidity measurement accuracy of ±3% RH. Drift is under 1% per year and declines logarithmically, compared to the industry average of 3% per year for some capacitive sensors.

The G-CAP2 can function in 100% humidity and its wide measurement range can handle most
applications. It is ideally suited for high volume applications, where it reduces the time required for final assembly and calibration. The simple, low-cost circuitry required for the G-CAP2 sensor can also produce cost savings.

General Eastern’s Sensor Evaluation Kit is available with the G-CAP2 sensor. The kit includes five G-CAP2 sensors and a PC board with a 0-5 volt output. The PC board features plug-in connectors that allow engineers to evaluate each G-CAP2 sensor without the need to design special test circuits. The Evaluation Kit includes full documentation, along with instructions on how to devise some simple tests.