SNAU250 November   2020 HDC2010 , HDC2021 , HDC2022 , HDC2080

 

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2.2.2 Application in Extreme Environments

Some applications require the usage of the HDC in harsh environments. Ensure that the exposure of the sensor to the maximum limit of temperature and humidity operating conditions meets the data sheet guidelines. Limiting exposure to volatile organic compounds at high concentration and long exposure time is critical. Usage in harsh environments must be carefully tested and qualified.

Exposure to any aqueous solutions is highly discouraged. In the event some aqueous exposure cannot be avoided, the following guidelines should be followed:

  • Exposure to acids or bases may affect humidity output accuracy readings
  • Bases are less damaging than acidic solutions. All acids must be considered damaging to the sensor. Etching substances such as H2O2 or NH3 at high concentrations can be damaging to the sensor.
  • Corrosive solutions at very low concentrations are not damaging to the sensor itself. However, care must be taken to ensure that the solder contacts are not damaged.