Hi,
I want to make a humidity sensor with the Humirel HS1101LF:
This sensor is a capacitor whose capacitance changes with RH. I built the circuit on the datasheet which turns the capacitance into a frequency and I am measuring this with a microcontroller.
The datasheet says the sensor has a nominal capacitance @ 55% RH of
177-183pF, a variation of 6 pF. If the sensitivity is 0.31pF/%RH, does this mean it comes out of the factory with an initial accuracy of +/-10%?Does anyone know how to get 2 or even 5% accuracy for about US$20 (in small quantities)?
Thanks XXXOOO :)