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Solar Pool Heating Temperature Sensors

Sensor playing up?
... find the right replacement

Confirm the fault, identify your controller, then pick the matching pool or roof sensor.

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Dontek AquaSun 2 or 3 replacement pool sensor

Replacement pool and roof probes Ascon & Dontek Sensors

Before you buy

Is the Sensor Actually Faulty?

If you think your temperature sensor is playing up, a good trick is to unplug both sensors and switch them over. If the faulty reading moves to the other channel, then it's most likely the sensor itself that needs replacing. The controller will also generally inform you of a sensor fault.

The next step is to identify your controller. There are two main solar controller manufacturers in Australia - Ascon and Dontek Electronics. These are the largest, so chances are you have one of these controllers. Both companies re-brand their controllers to the specific solar pool heating company they supply, however the controller can still be identified by its form factor - the general shape of the unit and where the buttons sit on the face.

Step one

Identify Your Controller and Sensor Plugs

Shown below are blank form factor boxes for both controller types. The branded label on your controller can be any colour, but generally the elements shown on these blank pictures should be present on all controllers.

Ascon controller temperature sensor layout

Ascon Solar Pool Heating Controller & Sensors

The Ascon controller has a quite distinct form factor with a red screen and red light text. Ascon has not changed their temperature sensor for at least 10 years or longer, so chances are the Ascon sensors below will be compatible with your older Ascon controller.

Ascon Pool Sensor Ascon Roof Sensor

Dontek controller temperature sensor layout

Dontek Solar Pool Heating Controller & Sensors

The Dontek controller also takes a distinct square form factor, with a green screen and black text. If your controller looks like this, the sensors below are probably compatible.

Note: in 2017 Dontek updated their controllers to + versions. These have special temperature sensors marked with a + label. A + version controller will take any of the older sensors below, but it's best to custom order a + sensor for the newer + controller.

Dontek Pool Sensor Dontek Roof Sensor

Ready to buy

Choose Your Sensor

Pool sensors sit in the solar suction line. Roof sensors mount in a high, sun exposed position, ideally on an angled warming plate. Not sure which controller you have? Check the templates above or send us a photo.

Ascon Pool SensorView product → Ascon Roof SensorView product → Dontek Pool SensorView product → Dontek Roof SensorView product →

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