My thermostat uses the expansion/contraction of a drop mercury to conduct electricity and trigger when to turn off and on.Iain_MS OP t1_iybxdvo wrote
Reply to comment by Dylsnick 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
To be fair mercury is pretty magical if you don’t think about how toxic it is.
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