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
KruxAF t1_iya3359 wrote on November 29, 2022 at 9:39 PM As someone else said, “The mercury does not expand/contract to activate these. It only acts as a switch” Permalink 5
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