My thermostat uses the expansion/contraction of a drop mercury to conduct electricity and trigger when to turn off and on.iwillneverreadthiscr t1_iyaxnw5 wrote
Nope... It has nothing to do with the temperature of the mercury; the actual sensor is a coiled piece of metal onto which the capsule containing the mercury is attached; when that coil expands, the capsule is tipped over enough to have the mercury close the circuit and power up the cooling system; as the room cools, the coil contracts, tipping the capsule in the opposite direction and breaking the circuit.
armerdan t1_iyb86y6 wrote
You are correct. The Mercury is just the switch, the thermometer is a coiled bimetallic strip.
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