Analogic differential controller for solar heating plants: it compares temperatures of fluids in the collectors and the
storage tanks and, when the difference is greater than DeltaT, starts the heat exchange through the pump. 3
temperature inputs from NTC sensors and 2 on-off relay outputs SPST. Additional thermostat for driving auxiliary
heat source. LEDs row show the value of measured temperature and others LEDs show output relays status.
Configuration of 6 different system layouts. Adjustable antifrost function.

Price : 150 €