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Forum Index : Microcontroller and PC projects : Humidity Calculation

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palcal

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Joined: 12/10/2011
Location: Australia
Posts: 2008
Posted: 04:16am 28 Nov 2025
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Does any one have a formula for Humidity calculaton from wet and dry bulb temperatures.
My outdoor sensor doesn't last long, the humidity here varies from over 80% early morning dropping to 65% to 70% during the day. At the moment it is 31 Deg. C and78% humidity, very uncomfortable for some but I'm used to it.
I want to use a wet and dry bulb which should last indefinately. I'm thinking of topping up the wet bulb tank with a feed from my garden watering system
  I tried a couple of formulas I found online but they weren't very accurate when compared to a psychrometric chart.
Edited 2025-11-28 14:16 by palcal
"It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all"
 
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