Nordic Hot Tub Sensor 074241 M7

Nordic hot tub sensor for select model M7 style heaters where the sensor is built into the heater manifold.

074241 sensor is multi-purpose in these systems and there are 2 required per heater (A and B).   The two sensors are the same and work together with the control system to determine safe operation of the spa heating system as well as provide temperature, hi limit functions.

These sensors are interchangeable and the heater requires 2 of them.  When changing sensors, the manufacturer recommends replacing them both at the same time.