On 2005-11-20, Neil wrote:
Can anyone recommend a thermostat that does not require a power supply and
can switch a 12v heater?
t
Thare exist mains rated bimetallic thermostats that can be used to
switch a relay to control your 12V load.

what is it you want to take the temperature of?

what is it you want to heat, and what is your heat source.

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Bye.
Jasen