Electronic Humidity Sensor

How do electronic humidity sensors work?

There are different types of humidity sensors like capacitive, resistive and thermal.
For a capacitive humidity sensor, the sensing element is a capacitor. The change in electrical permittivity of the dielectric material is measured to calculate the relative humidity values.
The principle behind resistive humidity sensors is the fact that the conductivity in nonmetallic conductors is dependent on their water content.

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Hi , @oliverthomas2314
Here is a project of BOLT IOT it might explain the working for you : https://www.boltiot.com/projects/humidity-and-temperature-monitoring-system
happy learning.

Regards,
Lokesh Agarwal