Hot Tub Sensors

Digital and mechanical sensors and parts for all major brand hot tubs.

All orders over $34.99 ship free in the US


Balboa 50' Hi-Limit Sensor
Balboa Hi-Limit Sensor with 1/4" Bulb Length: 50'

$120.06Buy Now

Balboa 96" Sensor Assembly
Balboa Temperature and Hi-Limit Sensor Assembly Dimensions: 1-1/2" Bulb Length, 1/4" Diameter (Hi-Limit) 2" Bulb Length, 3/8"...

$66.46Buy Now

Balboa Hi-Limit and Temperature Sensor Assembly
Balboa Hi-Limit and Temperature Sensor Assembly   Dimensions: 1-1/2" Bulb Length, 1/4" Diameter (Hi-Limit) 2" Bulb Length,...

$150.00Buy Now

Balboa ORP Sensor
Balboa ORP Sensor, to be used with Balboa pH/ORP Sensor Kit model 54129

$339.94Buy Now

Balboa pH/ORP Sensor Kit
pH/ORP Sensor Kit for Balboa M2, M3, and M7 EL systems   Kit does NOT include ORP Sensor 30315

$301.66Buy Now

Balboa Tape-on Sensor
Balboa Hi-Limit and Temperature Tape-on Sensor Sensor tapes directly onto heater manifold

$48.00Buy Now

Flow Switch Grid Control M-1
Manufacturer: Grid Controls Flow Switch Application: Dimension One Model: M-1 Plumbing Connection Size: 1-1/2" Plumbing...

$149.95Buy Now

Flow Switch Grid Control M-225
Manufacturer: Grid Controls Flow Switch Application: Cal-Spas Model: M-225 Plumbing Connection Size: 2" Plumbing Connection...

$189.95Buy Now

Flow Switch Marquis 850-9039
Q-12DS50 Flow switch used on Marquis spas.   3/4" slip tee with 1/2 threaded flow switch

$115.96Buy Now

Flow Switch Universal
  This common flow switch is Identical to and replaces:  HRWQ12DS1   Q12DS1.54SNO1   Q12DS501.54SNO1   608073 ...

$69.95Buy Now

Flow Switch Watkins 34875
Watkins Hot Springs Flow Switch

$66.18Buy Now

Hi Limit Mechanical
 This mechanical Hi Limit sensor is commonly used in air switch controls to re-set the heater. Available in: 275-2662-00 12" Capillary...

$39.95... more info

Hi Limit Surface Mount
The surface-mounted Hi Limit is commonly used on 5x5 Plate-Style Heaters.

$39.95Buy Now

Hydro-Quip Hi-Limit Sensor
18" HydroQuip - Gecko two pin style high limit sensor.

$41.02Buy Now

Hydro-Quip Hi-Limit Sensor (Old Style)
     Hydro-Quip Hi-Limit Sensor (Old Style) 4 Pin connector with blind 4th position.  

$50.22Buy Now

Hydro-Quip Temperature Sensor
Temperature Sensor with 5/16" diameter bulb

$39.62Buy Now

Hydro-Quip Temperature Sensor (Old Style)
Hydro-Quip Temp Sensor (Old Style) 3/8" bulb with 10' cord Blocked off number 4 pin

$83.22Buy Now

Jacuzzi Current Model Sensors
Temperature and Hi Limit Sensors for current model Jacuzzi J-300 Series Spas Built from 2002 to 2016. 6600-167 Temp Sensor with box end connector for...

$27.00... more info

Jacuzzi Flow Switch for J-300 Systems
Jacuzzi Flow Switches used in J-300 Series Hot Tubs from 2002+ Which Switch Do I Need  J-300 Series LCD models (All models with 10 button LCD...

$48.32... more info

Len Gordon Pressure Switch
  There are three common versions of this pressure switch that are often used in Balboa control boxes: 800120-3 25A SPDT 1/8" NPT...

$19.95... more info

Pressure Switch DTec 510ADO167
Dtec-1 has a smaller foot print, is universal and easy to install, shares same set point with other models and can be used to replace them. 

$39.95Buy Now

Pressure Switch Tridelta Tecmark 3903
Manufacturer: Tridelta/Tecmark 3903 Switch Type: Pressure Pressure Switch Rating: 1 to 5 psi Pressure Switch Amperage: 1A...

$29.95Buy Now

Pressure Switch Tridelta Tecmark 4010P
Manufacturer: Tridelta/Tecmark 4010P Switch Type: Pressure Pressure Switch Rating: 1 to 5 psi Pressure Switch Amperage: 25A...

$29.95Buy Now

Pressure Switch Tridelta Tecmark 4015P
Manufacturer: Tridelta/Tecmark 4015P Switch Type: Pressure Pressure Switch Rating: 1 to 5 psi Pressure Switch Amperage: 25A...

$32.95Buy Now

Sensor Balboa Hi Limit M7 53605
Sensor Application: Spa Control Sensor Type: Temp or Hi Limit Application: Balboa Water Group Model: M7 53605 Connector...

$49.95Buy Now

Sensor Caldera Hi Limit 72492
Hi limit thermistor for advent control systems found on Caldera spas from 2002 to current. 2 pin connector 1/4" bulb.

$34.50Buy Now

Sensor Caldera Thermostat 72493
Hi limit thermistor for advent control systems found on Caldera spas from 2002 to current. 2 pin connector 1/4" bulb

$34.50Buy Now

Sensor Watkins Hi Limit 38416 Old Style
High limit thermistor ("Limit Therm") used on Hot Spring and Tiger River spas from 1995 - 2002.  Connects to the outside of the...

$34.50Buy Now

Sensor Watkins Thermostat 38415 Old Style
Control thermistor ("Reg Therm") used on Hot Spring and Tiger River spas from 1995 - 2002.  Connects to the outside of the control box.

$34.50Buy Now
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