The Planted Tank Forum - View Single Post - Bimetal thermometer, how to adjust/reset?
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post #6 of (permalink) Old 11-17-2020, 09:47 PM
Algae Grower
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Most if not all of those have a large nut on the back. Just use a pair of pliers hold it tight, moved the entire screw and watch the needle move. Done it lot's of times for grill thermometers.
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