That hero helped design an automatic water tank heater
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I don’t understand process control; I want to achieve this in the vehicle: when the temperature of the water tank reaches 80 degrees, the temperature is measured, the solenoid valve activates, and the heat source is cut off. When the water temperature is below 30 degrees, the solenoid valve activates to turn on the heat source. Please ask that great hero to help design it; simplicity is preferred. :)
Let’s first talk about your current conditions, approach, and goals.
A control circuit using a thermocouple and a solenoid valve can be considered
This is the simplest temperature control example. All that is needed is to set up a temperature detection point (CU50/PT100), connect it to a digital display unit with upper and lower limit alarm outputs. The lower limit alarm activates the solenoid valve by connecting it through an intermediate relay (by connecting its normally open contacts to form a self-locking circuit), while the upper limit alarm, after being processed by the intermediate relay, causes its normally closed contacts to be connected in series with the circuit that triggers the lower limit alarm.