How do I wire a temperature sensor to operate a relay switch? What kind of relay do I need? Answered
There's a 2-wire thermostat sensor in my hot water storage tank that I want to signal a relay switch to turn on a circulating pump when it gets hot enough and off when it cools. An in-floor-heating relay might work, as the principle is the same (although reversed), but the temperature range is different. I want my pump to come on when the water in the tank is 50 degrees centigrade, and off when it's 45. Any suggestions?