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
D_daKid t1_iybi4b5 wrote on November 30, 2022 at 3:58 AM Reply to comment by gilareefer 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 Interesting. I've seen these before in older buildings and it's always intrigued me. Thanks! Permalink Parent 2
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