Re: Water Temperature Sending Unit Resistance
As dnult suggests, lower temp, higher resistance. I've seen them at 5k ohms for 70*F.
Usually, at 180*-200*F, 150-180 ohms. You've stated you adjusted for needle to show 180*F, but now won't show cold. Its out of calibration, I think.
The more correct way is to find the amount of current needed for full scale deflection. Induce this current value and adjust for full scale. Now, did the manfacturer give the value? Probably not.
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