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Arduino Forum weather sensor help!?!
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  • outdoor
  • humidity
  • weather
  • sensor
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weather sensor help!?!

funinalaska
funinalaska over 12 years ago

Does anyone know of a outdoor humidity sensor that works in extremely cold temps?

I need something that is moisture save and that will work at temperatures well below -40

I need it to have a minimum 2M watertight lead.

Right now for temperature I am using the DS18B20

It works for temperature but have now discovered I also need humidity readings as well.

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  • klong84
    0 klong84 over 12 years ago

    Hi, Sensirion makes several TEMP/HUMIDITY sensors from $6-$70 depending on the degree of resolution. Ebay carries many: the low end, DHT22 AM2302 Digital Temperature and Humidity Sensor Replace SHT10 SHT11 SHT15 | eBay for $5.58, rated for -40 - +125°C (-40 - +257°F). Just seek SHT[10,11,15,20,21,25,71,75] .

    Keith

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  • klong84
    0 klong84 over 12 years ago

    Hi, Sensirion makes several TEMP/HUMIDITY sensors from $6-$70 depending on the degree of resolution. Ebay carries many: the low end, DHT22 AM2302 Digital Temperature and Humidity Sensor Replace SHT10 SHT11 SHT15 | eBay for $5.58, rated for -40 - +125°C (-40 - +257°F). Just seek SHT[10,11,15,20,21,25,71,75] .

    Keith

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  • funinalaska
    0 funinalaska over 12 years ago in reply to klong84

    Yes, I am aware of the DHT22

    But as I said I need something that goes WELL BELOW -40

    I guess I should clarify, we regularly see temperatures below -50C

    and fairly common are temperatures below -55C

     

    Also since our temperature range here is fairly drastic

    -55C in winter up to about 25C in the summer, what is the best way to protect a sensor such as these outdoors from precipitation, blowing precipitation (snow) and dew?

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