>I'm looking for a simple, non powered temp sensor that when it reaches a
>certain temp, it closes a relay. Similar to like a thermostat, but I need
>somethig a little more elegant if possible.  I just want to trip an alarm
>(clse a relay) if the temp reaches a certain point

Go looking for a bimetal thermostat of the kind used in home heating. This
will come with a roughly calibrated temperature scale as well.

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