thermostatA switch used to control temperature in a room, an oven or steam iron?
bi-metallic strip (two metals with different rates of expansion
it curves when heat is applied)
serves as a thermostat (temperature sensitive switch)
as someone else just said
Other operating mechanisms
a Bourdon tube (coiled pipe with liquid inside)
a sealed diaghragm (often found in a room thermostat ... gets ';fatter'; as the temperature increases)
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