January 8, 2016
Source: Sensors Online
Pressure Sensor Construction Addresses Challenges in Wet Environments
by Karmjit Sidhu, TE Connectivity
Accurate measurement of low pressure with respect to atmospheric reference (typically called vented or gauge reference) requires that pressure sensors breathe under dry, humid and wet conditions. In humid and wet environments, challenges are posed on how to operate the pressure sensor without allowing water into the back end of the sensors, causing the device to malfunction. In submersible water applications, the atmospheric-to-depth temperature differential can be significant for a pumping effect to occur where moist air can be drawn into the sensor via the vent line, causing condensation to attack sensitive electronic components to fail.
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