Differential thermostat for solar heating with three sensors* that controls the water circulation pump based on the temperature differential between the solar panels and the thermal tank or swimming pool. This instrument has the exclusive vacuum tube function that prevents thermal shock in the pipes, in addition to others that to ensure the yield of the heating system, prevent water freezing during winter and control overheating. Additionally, it includes an intelligent functions lock system to prevent those unauthorized from changing the control parameters.

* Two sensors included.