Protect sensors in high humidity environments

Hello! First of all, since this is my first post I would like to thank all of you for creating this amazing community, your work is both inspiring and really helpful!

I’m working on a mushroom cultivation chamber and everything was working fine until the DHT22 detector saturated and stop working properly (now it always reads about 95% humidity). After that, I bought an SHT31 but i’m worried to damage this new sensor, so im willing to be more careful… How do you protect your sensors ? Are they supposed to work in >80% humidity enviroments for long periods of time? (about some months)

Thanks in advance!

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Different sensors handle high humidity differently. For most humidity sensors, it’s not great to allow condensation (temperature drops below the dew point or you allow a humidifier to run unregulated). If condensation does occur, you can mitigate damage by using purified water in your humidifier, however this doesn’t prevent particles/spores/etc. in the air from contacting the water droplets that then condense on the sensor. Filters can also help. In any case, you’re likely to have to replace the sensor at some point. The DHT sensors are also not high quality, so likely any other sensor you use will yield better performance.

@Michel Get the Atlas EZO-HUM. It’s well worth the $45 to have something that is accurate and waterproof enough that you can submerge it.

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