Sensors and Switches There are no products in this category.

Subcategories

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  Flow Switches

  Flow switches are less common in hot tubs than pressure switches. They detect water flow. Water flow moves a tiny paddle that operates a micro switch.

  This section also represents the only Harwil flow switches available.

  It is EXTRTEMELY important that you follow dimensions and NOT Q-12 codes.

  If you Harwil switch is not here, we cannot help - sorry.

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  Pressure Switches

  Pressure switches protect your hot tub against low flow situations, which would otherwise result in damage to your hot tub 'workings'. When flow is insufficient through the heater the pressure switch shuts off the heater. Most pressure switches are adjustable, but make sure that water flow isn't restricted by another cause first (such as dirty filters) before making adjustments.

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  Temp & Hi-Limit Sensors

  These temperature sensing devices are present to protect your spa from overheat conditions. Sensing bulbs are gas-filled and some may have adjustment facilities.

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  Air Switches

  Heater air (pressure) switches as less common in Europe. We stock all of the MOST common switches. All of these images are of the exact part.