Hayward CAT Controller pH Sensor Probe 10 Foot Cable

Hayward CAT Controller pH Sensor Probe, 10-foot cable (W3PRO15-10). OEM replacement pH electrode for Hayward CAT and HCC series chemical automation pool controls. 1/2" NPT ABS body, BNC connector. For equipment rooms where the controller and flow cell require more than 24 inches of cable reach.

• SKU: W3PRO15-10
• OEM pH replacement probe for Hayward CAT and HCC series controllers
• 10-foot cable for installations where the controller and flow cell are farther apart
• Compatible with CAT1000, CAT3500, CAT4000, CAT5000, CAT5500, HCC1000, HCC2000
• Direct replacement; same BNC connector and port threading as factory-installed probe
• 1/2" NPT injection-molded ABS body; color-coded BNC connector
• Two-point calibration via CAT controller interface (pH 7.0 and 4.0 buffers)
• Verify against handheld photometric test after calibration; within 0.1 to 0.2 pH units is acceptable
• Never store dry; use pH 4.0 buffer or probe storage solution during seasonal shutdown
• Recommended replacement interval: every 12 to 24 months

Hayward CAT Controller pH Probe (W3PRO15-10): OEM Replacement for CAT and HCC Series Pool Controls

The W3PRO15-10 is the factory pH sensor for Hayward CAT and HCC series chemical automation with a 10-foot cable for installations where the flow cell and controller are not side by side. Direct replacement; no adapters or controller reconfiguration required. Install in a flow cell or bypass sample cell on the return line, downstream of filtration and chemical injection. Two-point calibrate using fresh NIST-traceable pH 7.0 and 4.0 buffers after installation.

10-Foot vs. 24-Inch Cable: Which Length Do You Need?

Measure the routed cable path from the flow cell pH port to the controller's pH input before ordering. The 10-foot version is appropriate when that distance exceeds 22 inches. For compact installations where controller and flow cell are adjacent, use the 24-inch version (W3PRO15-2). Never splice or extend the cable.

Hayward CAT Controller pH Probe 10-Foot Specifications

Frequently Asked Questions

Is the 10-foot cable version the same probe as the 24-inch version?

Yes. Same sensing element, electrode technology, and BNC connector. The only difference is cable length.

What calibration buffers do I need?

Use fresh, unexpired NIST-traceable pH 7.0 and 4.0 buffer solutions. Expired buffers are a common cause of calibration error. Verify the controller's displayed pH against a handheld photometric test after calibration; agreement within 0.1 to 0.2 pH units is acceptable.

How should I store the probe during seasonal shutdown?

Store in a manufacturer-recommended probe storage solution or pH 4.0 buffer in a sealed cap. Never store dry, and never store in distilled or deionized water.

Should I replace the ORP probe at the same time?

Replacing both probes in a single service visit is the most efficient approach and ensures the full measurement pair is renewed simultaneously.