My thermostat uses the expansion/contraction of a drop mercury to conduct electricity and trigger when to turn off and on. Submitted by Iain_MS t3_z84a06 on November 29, 2022 at 7:58 PM in mildlyinteresting 91 comments 197
darrellbear t1_iybvsvj wrote on November 30, 2022 at 6:11 AM Reply to comment by WFPBvegan2 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 It's called a mercury switch, used to be pretty common. Permalink Parent 3
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