I'm surprised this page doesn't mention the automotive thermostat which uses the same principle to control the flow of coolant between the engine block and radiator in an ICE vehicle.
The "See Also" has "Wax thermostatic element" [0] which seems focused on automotive applications, so perhaps it was there and grew large-enough that it got split off.
> Its principal application is in automotive thermostats used in the engine cooling system.
cbdumas · · focus · HN ↗
jammaloo · · focus · HN ↗
Terr_ · · focus · HN ↗
> Its principal application is in automotive thermostats used in the engine cooling system.
[0] <a href="https://en.wikipedia.org/wiki/Wax_thermostatic_element" rel="nofollow">https://en.wikipedia.org/wiki/Wax_thermostatic_element