The N322S is a controller designed for solar water heating applications and comes complete with two NTC sensors.

It controls the water circulation system according to the difference of temperature between the two sensors mounted on the solar collector and the storage tank (or swimming pool). It offers adjustable On and Off differentials, static (T1 or T2 or T1-T2) or dynamic display (3 seconds each of T1, T2, T1-T2.