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Feedthroughs For Humidity Sensors

Humidity sensors (or hygrometers) are used to measure the vapor content in the air. In automotive applications, the most common types are absorption hygrometers. These types of hygrometers contain a hygroscopic material (a material that retains water)that changes its characteristic when exposed to different levels of humidity.

The sensors are enclosed in a hermetically sealed housing component to protect them from harmful environmental influences. At the same time, the sensors must still be able to access the ambient air so as to measure the vapor content. This is achieved through small shafts or open caps that can be adapted according to customer requirements.