Sensors Circuit Board

Caldera Hi-Limit sensor used on the Advent control systems from 2002 - current. This sensor is found mounted to your heater and detects high heat conditions to protect the heater from running dry or...

OEM Caldera temperature sensor with 3/8" bulb. This sensor is normally found mounted into a sensor well and makes direct contact with the spa water. On the other end it plugs into the circuit board...

Temperature Thermister, aka temp sensor for the Watkins made Solana and Hot Spot hot tubs from 2003 forward. This sensor has a 3/8" bulb and a two wire, four pin JST plug that connects to the circuit...

This part is a 96" Hi Limit Sensor with the box style connectors.. Thi

You are buying a Cal Spa 7000 or 9000 Heater M7 foam type Sensor. This Sensor comes with the wire, Connector, and The foam sensor. It DOES NOT include the tube, the tube side mount or the pull ties...

Temperature&Hi Limit Sensor

This part s no longer available and there are not replacements for it.. Sensor, Temp, Brett Aqualine, WTS020, 20', w/Clamp

For 6100, 7100, 710, 9100, 8400, 8600, 9400, and 9600 systems

This sensor is no longer available.. Hi Limit Sensor