Humidity sensor vishay 2381 691 90001 buy humidity sensor capacitive from vishay a humidity sensor which operates on a capacitance charge with change in relative humidity p incorporates the following features 10 to 90 rh humidity 122pf capacitance 0 4pf rh sensitivity 3 hysteresis 300s response time 0 deg c to 85 deg c 1 to 1000khz frequency 15v supply voltage this capacitive atmospheric humidity sensor consists of a non conductive foil which is covered on both sides with a