Weather Station Hardware > Ambient Weather and Ecowitt and other Fine Offset clones
Readings from a WH31 in a small shelter affected by sun
broadstairs:
I have a WH31 mounted about 3 feet below my WS80 on the same pole in a shelter (See here) and when the sun comes out is reads significantly above the reading from my WS80 on occasions almost double in full sun :shock:
Now when my WS80 temp/hum sensor failed I had this same sensor/shelter combination mounted in shadow on the side of my house under the eaves and the readings were pretty good as it never got any sun. Now I found that I could not keep it there as it was on the outside wall where my boiler is mounted indoors (no where near the boiler flue though) and the boiler uses the same 868mhz frequency for the room stat/controller and kept on losing communication with the room stat because the WH31 is on this same frequency. Now I am unable to mount the WH31 anywhere else in shadow as it will still be too close to the boiler, hence the move to the pole.
So now the question, can anyone suggest an affordable alternative enclosure to use for the WH31 as I want to be able to use this sensor as a back up for the WS80 should that sensor fail again? Preferably one that has been used in anger!
Stuart
olicat:
Hi Stuart,
what do you mean by "affordable"?
Really good solar radiation shields that you can use in direct sunlight are quite expensive.
Barani Meteoshield Pro and Metspec Rad02 cost more than some people pay for their entire station.
There are a number of do-it-yourself shields that look promising, some of which are actively ventilated.
I personally use a Davis 7714 - but the temperature sensor only fits in tilted position. But the results are acceptable (at least for me).
BTW: With deactivated temperature compensation, my WH65 and WS90 also show values that are clearly too high (+2-3°C).
It won't be much better with the WS80.
Oliver
Dador:
--- Quote from: olicat on January 28, 2023, 07:39:08 AM ---I personally use a Davis 7714 - but the temperature sensor only fits in tilted position. But the results are acceptable (at least for me).
--- End quote ---
I also use the WH31 sensor in the Davis 7714 radiation shield. I believe that this is the best option in relation to the quality of measurements / price. The average daily temperature is almost always the same as in the Barani radiation shield.
The WH31 sensor actually goes in there flat, and with a slight resistance, so there is no need to use other sensor mounts.
Gyvate:
--- Quote from: Dador on January 28, 2023, 10:51:17 AM ---
--- Quote from: olicat on January 28, 2023, 07:39:08 AM ---I personally use a Davis 7714 - but the temperature sensor only fits in tilted position. But the results are acceptable (at least for me).
--- End quote ---
I also use the WH31 sensor in the Davis 7714 radiation shield. I believe that this is the best option in relation to the quality of measurements / price. The average daily temperature is almost always the same as in the Barani radiation shield.
The WH31 sensor actually goes in there flat, and with a slight resistance, so there is no need to use other sensor mounts.
--- End quote ---
Average yes, but the performance (reaction time to changes), especially after heavy rainfalls, snow, ice etc. of the MeteoShield Pro is unbeaten. :-)
hiljo:
--- Quote from: Gyvate on January 28, 2023, 11:23:29 AM ---Average yes, but the performance (reaction time to changes), especially after heavy rainfalls, snow, ice etc. of the MeteoShield Pro is unbeaten. :-)
--- End quote ---
Is the WH31 sensor of Ecowitt that precise that a housing of approximately $200 is justifiable?
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