Author Topic: Air quality sensors in winter (freezing/snow) conditions  (Read 1058 times)

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Offline beruk

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Air quality sensors in winter (freezing/snow) conditions
« on: June 28, 2020, 07:13:44 PM »
Hello,

I have an Ecowitt HP2553 station to which I’d like to add a WH41 PM2.5 outdoor sensor. But I live in Québec, Canada, where we have sub-zero C temperatures in the winter and (lots of) snow.

I have been unable to find any information on if/how air quality sensors work in these conditions (neither general info nor specific to the WH41).

Would anyone here have some knowledge or experience to share?

Thanks!

Pascal

Offline Autofill

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Re: Air quality sensors in winter (freezing/snow) conditions
« Reply #1 on: October 20, 2020, 12:52:19 AM »
I'm going through this right now. So far so good. During snow the air quality can spike a bit.
Ecowitt WH2320-E
Ecowitt HP2551-C
Ecowitt GW1000
Ecowitt GW1100
Ecowitt WH69E
Ecowitt WH32B
Ecowitt WH57 (x2, spare)
Ecowitt WH51 (x5)
Ecowitt WH41
Ecowitt WH31 (x8)
Ecowitt WH55 (x4)
Ecowitt WH45
Ecowitt WN34S
Ecowitt WN35

Offline fkapp

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Re: Air quality sensors in winter (freezing/snow) conditions
« Reply #2 on: December 10, 2020, 11:22:06 AM »
What are the temp operating specs for the wh41?
Curious as sounds like works ok in cold but wondering what minimum temperature limit is?

Offline Autofill

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Re: Air quality sensors in winter (freezing/snow) conditions
« Reply #3 on: December 10, 2020, 11:42:40 AM »
So far so good except mine went offline when it hit -20oC, and came back to life when it warmed up a little. The batteries are freezing at this temperature. Works pretty well below this temperature.
Ecowitt WH2320-E
Ecowitt HP2551-C
Ecowitt GW1000
Ecowitt GW1100
Ecowitt WH69E
Ecowitt WH32B
Ecowitt WH57 (x2, spare)
Ecowitt WH51 (x5)
Ecowitt WH41
Ecowitt WH31 (x8)
Ecowitt WH55 (x4)
Ecowitt WH45
Ecowitt WN34S
Ecowitt WN35

Offline Mandrake

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Re: Air quality sensors in winter (freezing/snow) conditions
« Reply #4 on: January 19, 2021, 04:08:47 AM »
Whilst the temperature is a constraint for battery technology you could always supplement the batteries with a more powerful solar panel such as those used by outdoor cams.
Obviously this would keep the sensor going only during daylight and not if covered in ice/snow/frost but it might help.
Retired: Old Maplin N96Y/FO Weather station
G1ZFO

Ecowitt HP2551A + WH65 Tri-Wing (Wunderground: IGUILDFO67)
Ecowitt GW1000 (Wunderground: IGUILDFO68)
Ecowitt GW1000 (Mk2) test environment driving CumulusMX on a RPi 3b
Ecowitt WH51 (x6) Soil Moisture Sensor
Ecowitt WH41 PM2.5 AQM Sensor
Ecowitt WH31 (x8) Thermo/Hygro Sensor
Ecowitt WS80 Ultrasonic Anemometer (pre-prod test)
Ecowitt WH57 Lightning Sensor (pre-prod test)
Ecowitt WH32-EP (SHT35) + Davis 7714 Screen
Ecowitt WH45 CO2/PM2.5/PM10 (production Test)
Ecowitt WN34 Soil Temperature Sensor -Test
Ecowitt WN34 Water Temperature Sensor -Test