Outdoor temp & humidity sensors

[dr pepper]

I have a weather station.
It uses DHT22 & BMP280 sensors as well as others.
The sensors mentioned above have both gone haywire, looks like they dont survive outdoors during English winters.
Any suggestions on sensors that can cope with our miserable weather?

 

[schmitt trigger]

Those also don't survive Texas summers, either.

In the past, I've used successfully the Honeywell HIH4000 humidity sensors. You have to shield them from direct light and they are expensive, about US$16, but they are rugged.
Oh! and I forget: its output is a nonlinear analog voltage, with some temperature dependency to boot.

 

[dr pepper]

I might have one similar to that, I'll have a look.

 

[Pommie]

I found the DHT22 to be unreliable until I discovered that it needs a pullup on the data line.

Mike.

 

[dr pepper]

Yes I have a 10k pullup.
And the temp reading is still reliable and accurate, its the humidity that keeps reading 1%, I'm fairly sure its the sensor element rather than comms.

 

[Nigel Goodwin]

Yes I have a 10k pullup.
And the temp reading is still reliable and accurate, its the humidity that keeps reading 1%, I'm fairly sure its the sensor element rather than comms.

Must admit, I've found the DHT22 humidity readings a bit suspect, the temperature always seems fine though.

 

[dr pepper]

One things for sure 1% humidity on a day like today isnt right.
Neither is 1268 millibars for atmospheric pressure.
I hope the thing hasnt got insects in it, hate the little critters.

 

[schmitt trigger]

Same experience here. Temp readings were OK, but the RH readings were clearly and totally out of whack.

 

[dr pepper]

I found this in my stash of machine parts, its a pneumatic silencer for a directional control valve, the white thingy is very porous you can blow through it.
I was thinking it would make a weather resistant housing for a DHT22 or SHT05, might be a little more 'professional'.