Sensor Maintenance Procedure

How to Clean and Maintain Your Pool Water Leveller Sensor

Purpose

Over time, natural mineral deposits from pool water can form on the marine-grade stainless-steel probes inside the sensor. This is normal and may appear as a brown, rust-like or chalky build-up.
Cleaning the sensor unit is simple and doing so periodically ensures accurate water-level detection and reliable system operation.

Recommended Frequency

Perform this maintenance every 6–12 months, or sooner if you notice the water level not maintaining as expected.

What You’ll Need

  • Plain white vinegar
  • A soft cloth or non-scratch sponge
  • A small cup or container (deep enough to submerge the probe end)
  • A Phillips screwdriver

Step-by-Step Procedure

1. Power Off

  • Switch off the control unit at the power point.
  • Disconnect the sensor cable from the control unit.

2. Remove the Sensor Assembly

  • Locate the single screw at the top of the sensor where the cable gland meets the cap.
  • Remove this screw to slide the sensor enclosure tube off.
  • At the bottom of the sensor, remove the second screw that holds the baffle cap in place.
  • Gently remove the baffle cap from the tube.

3. Soak the Probes

  • Place the bottom baffle cap, and probes end into a cup of white vinegar.
  • Ensure the stainless-steel probes are fully submerged.
  • Let soak for approximately 90 minutes.
    • Light mineral build-up will usually dissolve completely.
    • Heavier deposits will soften and become easy to wipe off.
  • For severe build-up, a longer soak (up to overnight) is fine.

4. Wipe and Rinse

  • After soaking, use a soft cloth to gently wipe the probe surfaces clean.
    • The softened residue may feel slimy—this is normal and wipes away easily.
  • Rinse the parts thoroughly with clean water and dry them with a towel or cloth.

5. Reassemble

  • Refit the baffle bottom cap, aligning the screw holes.
  • Secure with the bottom screw.
  • Slide the outer enclosure tube back over the assembly and secure it with the top screw.

6. Test Operation

  1. Fill a small container or bucket with water.
  2. Plug the sensor back into the control unit.
  3. Turn on the power.
  4. Place the sensor into the water.
  5. Slowly lift it out until you the solenoid opens, then lower it back until it closes.
    • A short delay in valve operation is normal—the baffle slows water movement to ensure stable readings.

Notes

  • The deposits on the probes are harmless mineral build-up, not rust.
  • Do not use abrasive tools or metal brushes—they can damage the stainless-steel surface.
  • Do not open or tamper with the sensor wiring or electronics.
  • Vinegar is safe for all components and environmentally friendly.