Zodiac - Next gen pH/ORP dual link module sensor PCB - R0825300

Zodiac – Next gen pH/ORP dual link module sensor PCB – R0825300

The Zodiac R0825300 is a genuine replacement Next Generation pH/ORP Dual Link Module Sensor PCB designed specifically for use with the Zodiac eXO iQ Pro and Hydroxinator iQ Pro chlorinator systems. This printed circuit board sits at the heart of the pH and ORP (oxidation-reduction potential) monitoring module, enabling the system to accurately read and process the chemical signals delivered by the pH and ORP probes. Without a functioning sensor PCB, the chlorinator cannot correctly interpret water chemistry data, making this component critical to the automated operation of the system.

As a next-generation component, this PCB is the updated version of the original sensor board and is intended to bring improved signal processing reliability to the dual-link module. It interfaces directly with the probes and transmits the measured values to the chlorinator’s control unit, allowing the system to make real-time adjustments to chlorine output and pH correction dosing.

Technical characteristics and compatibility

The R0825300 sensor PCB is engineered to fit the Next Generation pH/ORP module housing used in the eXO iQ Pro and Hydroxinator iQ Pro platforms. These are Zodiac’s premium automatic chlorination and water chemistry management systems, which use both ORP sensing to control chlorine production and pH sensing to manage acid or base dosing. The dual-link functionality means the board supports simultaneous communication with both the pH and ORP probes through a single integrated module, simplifying the signal path and reducing potential points of failure.

Installation involves accessing the pH/ORP module enclosure and replacing the existing PCB with this new unit. This is a component-level repair intended for qualified technicians or experienced pool system operators. The board is designed to slot directly into the existing module without requiring modifications to the housing or wiring harness. The corresponding rear cover for the module (R0825400) is available separately if the housing also requires replacement.

Suitability and intended application

This spare part is intended for pool owners and service technicians who are maintaining or repairing a Zodiac eXO iQ Pro or Hydroxinator iQ Pro chlorination system. These systems are typically installed on residential swimming pools where automated chemical management is desired. If the pH/ORP module is producing erratic readings, failing to communicate with the control unit, or has suffered physical or electrical damage, replacing the sensor PCB with a genuine R0825300 is the recommended repair approach before replacing the entire module assembly. Using a genuine Zodiac part ensures full compatibility and preserves the integrity of the automated dosing system.