My thermostat uses the expansion/contraction of a drop mercury to conduct electricity and trigger when to turn off and on.your_Assholiness t1_iya7ht1 wrote
Reply to comment by your_Assholiness in My thermostat uses the expansion/contraction of a drop mercury to conduct electricity and trigger when to turn off and on. by Iain_MS
sorry I only read the first entry... I agree with ksquires1988 it's a bi-metal strip
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