Re: What temp sensor unit to use?
Idiot lights use a thermal switch.
Gauges uses a temperature sensor, the hotter the coolant gets, the lower the resistance, the more the gauge indicates - negative temperature coefficient is the name.
If Autometer gauge and an Autometer sensor with the right coefficient, dunk it into a pan of water with a known thermometer and hook up power to the gauge and sensor and see what the gauge indicates.
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