Low temperature Humidity sensor

[piyush manavar]

Hi,

I need humidity sensor which can operate at very low temperature -90° C. If any body know about the sensor or vendors or link, please let me know.

Thanks
-Piyush

 

[Venkadesh_M]

https://en.wikipedia.org/wiki/Humidity

Humidity is the amount of water vapor in the air. Water vapor is the gaseous state of water and is invisible

Is it is possible for water to be vapor in -90° C ?

https://www.answers.com/Q/Can_water_evaporate_at_any_temperature

EVAPORATION is the process by which liquid water enters a gaseous state as water vapor. This can occur at any temperature above the freezing point of 32°F / 0°C

 

[piyush manavar]

hi,

Your question is valid and i had also same question.
Just read this report see the temp vs altitude and Humidity vs altitude. How it is happening i don't know.
**broken link removed**

 

[Venkadesh_M]

www.mouser.in/Sensors/Environmental-Sensors/Board-Mount-Humidity-Sensors/_/N-axfmy?P=1z0juqs&Keyword=humidity+sensors&FS=True

Upto -40°C is available find the limiting factor which makes it only upto -40°C and if it is really will work means you can use it in -90°C

PDF

 

[piyush manavar]

Thanks Venkadesh_M

I have tried the same sensor but it is not working below -40° C. up to -40° C it is working very well.
I think i have to try some thing heating kind of mechanism but don't know will it affect the actual reading or not.

Thanks
-Piyush