Hayward - pH Probe for AquaRite Pro - GLX-PROBE-PH

Hayward – pH Probe for AquaRite Pro – GLX-PROBE-PH

The Hayward GLX-PROBE-PH is the genuine factory replacement pH sensor designed specifically for Hayward AquaRite Pro Sense and Dispense systems, including the AQL-CHEM and AQL-CHEM-UPG models. This is not an aftermarket equivalent — it is the same probe supplied with new Hayward dosing systems, ensuring that the sensor’s output range, electrode impedance, and response curve are a perfect match for your controller’s measurement circuit. Using a genuine part eliminates the risk of calibration offset, unstable readings, or compatibility issues that can arise with third-party sensors.

Why pH Control Matters in Your Pool

pH is the single most critical parameter in pool water chemistry. When the pH drifts below 7.2, the water becomes corrosive: it attacks pool surfaces, fittings, and heat exchanger elements, and causes eye and skin irritation for swimmers. When pH rises above 7.6, free chlorine loses the majority of its disinfecting power — at pH 8.0, less than 20% of chlorine is in its active hypochlorous acid form, meaning your sanitiser consumption rises sharply while actual disinfection effectiveness drops. The GLX-PROBE-PH provides the continuous, real-time pH measurement that your AquaRite Pro system needs to modulate pH correction doses automatically, keeping pool water consistently in the ideal 7.2–7.6 range without manual testing or intervention.

Installation and Compatibility

The probe connects via a standard BNC connector and mounts directly into the existing sensor port in your Hayward flow cell or bypass assembly. No additional adapters, wiring changes, or tools are required — it is a straightforward plug-and-replace operation. The GLX-PROBE-PH is compatible with both conventional chlorine-dosed pools and salt electrolysis installations, making it suitable for the full range of AquaRite Pro and Sense and Dispense configurations. The sensor body is rated for continuous immersion in pool water and is resistant to chlorine, salt, and standard pool chemicals.

Signs That Your pH Probe Needs Replacing

pH sensors have a finite service life, typically between one and three years depending on water chemistry and maintenance. The most common indicators that replacement is due include: sluggish response times where the reading takes several minutes to stabilise after a change in water chemistry; readings that drift continuously rather than holding a stable value; repeated calibration failures where the probe cannot be brought into range with standard buffer solutions; and controller alarms indicating a probe fault or out-of-range signal. Replacing a degraded probe promptly avoids incorrect dosing decisions — the controller cannot adjust pH correctly if the measurement it is acting on is inaccurate.

Maintenance and Calibration Guidance

To maximise the service life of your GLX-PROBE-PH, calibrate it using standard buffer solutions (pH 7.00 and pH 4.00 or pH 10.00) at installation and at regular intervals throughout the swimming season — typically every four to eight weeks during heavy use periods. Rinse the probe with clean water before and after calibration. Keep the sensor tip free from calcium scale, biofilm, and grease by gently cleaning it with a soft cloth and a mild acid solution (such as a citric acid rinse) if fouling occurs. When the system is winterised or the probe is removed for storage, keep the tip immersed in a suitable electrode storage solution rather than letting it dry out — this preserves the hydrated gel layer on the glass membrane and significantly extends probe life.