Acquisition of the temperature differential between two independent NTC sensors. Mainly suited for use with solar heating systems for the triggering of the circulating pump. Also suited for control of heating and service water pumps, valves or heat pumps in dependence on a certain temperature difference. Sensors are not included in the scope of
the delivery (for choice of sensors available, see as of page 133). Application of sensor types according to sensor no. indicated (i.e. all no. 5 / 25 sensor types can be used, e.g. HF-5, LF-25 or AF-5, etc.). Two sensors need to be ordered per device. Avoid parallel laying of sensor line and mains supply cables or protect it by shielding.