My thermostat uses the expansion/contraction of a drop mercury to conduct electricity and trigger when to turn off and on.D_daKid t1_iybi4b5 wrote
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!
Viewing a single comment thread. View all comments