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Iain_MS OP t1_iy9oze8 wrote

Reply to comment by Prindagelf 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

Oh cool! I just assumed it would be expansion based like a thermometer. Thanks for insight!

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JSONJSONJSON t1_iyauebs wrote

Yep, thermos are very small tubes, so very slight volume change is apparent.

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SFXBTPD t1_iybd7fy wrote

Well its the way they taper down from a large bulb. The volume only changes by about 2% from 0 to 100C

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JSONJSONJSON t1_iybftwk wrote

Oh! Is that because of decreased rate of change at higher temps? So the scale we read is consistent.

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