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What is the battery for an old Caliber III Hygrometer?
- Thread starter dufous
- Start date
Switcher56
Comfortably numb!
Look up CR 2032. That's what that holder looks like 
They are 2032. I swapped over to inkbirds.You can calibrate using Boveda 72% pack. The inkbirds read as good as Calibers. Calibers do have a better accuracy. As long as you calibrate it wont matter. There are a few better options as long as you calibrate before use.
Calibers are 24$...
Inkbirds 13$
https://www.amazon.com/Inkbird-ITH-...1604168059&sprefix=caliber+1v,aps,480&sr=8-12
