Heat Sensor Assembly 30337 30337-Q

Theat Sensor Assembly for hot tubs that use Balboa spa packs and typically have pressure switches instead of built-in sensors inside the heater. 

This sensor set by Balboa Instruments includes both the temperature and hi limit sensors.  The temperature sensor is mounted into a thermowell in the hot tub shell and is used to measure spa water temperature. This water temperature sensor is mounted from underneath the spa cabinet.  The other sensor is a high limit sensor that is typically mounted under the flow-through electric heater usually located underneath the spa pack.  This safety sensor assures the temperature of the heater does not become excessive. 

The sensor set plugs right into the Balboa circuit board.