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What temperature do you keep your thermostat at? (lemmy.zip)
submitted 2 years ago by to c/asklemmy@lemmy.ml
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Title. We keep ours at 75F, parents do 77F, and in laws 68F. It made me curious what everyone else keeps theirs at?

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[โ€“] 7 points 2 years ago (1 child)

older ones are often electrical, but not really electronic. they use a bimetal strip that bends due to changing temperatures, to complete a circuit at the point you set the slider. it's actually a really fascinatingly simple bit of tech.

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  • [โ€“] 3 points 2 years ago (1 child)

    Mine growing up used a bit of mercury in a sealed vial mounted to that bimetallic strip.

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  • [โ€“] 1 point 2 years ago (2 children)

    any idea what the mercury was for? something about getting the heat in and out of the strip faster maybe?

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  • [โ€“] 3 points 2 years ago

    The Mercury is in a glass tube with two wires and the tube is attached to the bimetallic strip in such a way that the motion of the Mercury due to gravity as the strip moves will close the circuit between the two wires. The Mercury is just being used a liquid conductor.

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