.product-description { color: inherit; line-height: 1.75; max-width: 860px; } .product-description h2 { font-size: 1.2rem; font-weight: 700; margin: 2rem 0 0.6rem; border-bottom: 2px solid #cce0ff; padding-bottom: 0.3rem; } .product-description h3 { font-size: 1rem; font-weight: 700; margin: 1.5rem 0 0.4rem; } .product-description p { margin: 0 0 1rem; } .product-description ul { margin: 0 0 1rem 1.4rem; padding: 0; } .product-description ul li { margin-bottom: 0.4rem; } .product-description .spec-list { margin: 1rem 0 1.5rem; font-size: 0.95rem; border: 1px solid #c4d9f0; border-radius: 4px; overflow: hidden; } .product-description .spec-row { display: flex; flex-wrap: wrap; border-bottom: 1px solid #c4d9f0; } .product-description .spec-row:last-child { border-bottom: none; } .product-description .spec-key { flex: 0 0 38%; background-color: #e8f1fb; font-weight: 700; padding: 0.5rem 0.75rem; box-sizing: border-box; } .product-description .spec-val { flex: 1 1 62%; padding: 0.5rem 0.75rem; box-sizing: border-box; } .product-description .spec-row:nth-child(even) .spec-val { background-color: #f5f9ff; } .product-description .spec-row:nth-child(even) .spec-key { background-color: #edf4fc; } @media (max-width: 540px) { .product-description .spec-key, .product-description .spec-val { flex: 0 0 100%; } .product-description .spec-key { padding-bottom: 0.2rem; } .product-description .spec-val { padding-top: 0.2rem; } } .product-description .doc-links { background-color: #f0f6ff; border-left: 4px solid #0066cc; padding: 0.75rem 1rem; margin: 1.5rem 0; border-radius: 0 4px 4px 0; } .product-description .doc-links h2 { border-bottom: none; margin: 0 0 0.4rem; font-size: 1rem; padding-bottom: 0; } .product-description .doc-links ul { margin: 0 0 0 1.2rem; } Hayward CAT Controller ORP Sensor Probe, 24-inch cable (W3PRO25-2). OEM replacement ORP electrode for Hayward CAT and HCC series chemical automation pool controls. 1/2" NPT ABS body, BNC connector. 2-year warranty. For compact equipment rooms where the controller and flow cell are in close proximity. SKU: W3PRO25-2 2-year warranty 24-inch cable for compact equipment rooms where controller and flow cell are in close proximity 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 Verify against a calibrated portable ORP meter after installation; agreement within 10 to 20 mV is acceptable ORP setpoint target: 650 mV or above per CDC Model Aquatic Health Code Do not extend or splice the cable; added impedance distorts the millivolt signal Recommended replacement interval: every 12 to 24 months Need a gold tip for demanding environments? See W3PRO25-AU-2 Hayward CAT Controller ORP Probe (W3PRO25-2): ORP Monitoring for CAT and HCC Series Pool Controls The W3PRO25-2 is the standard ORM replacement probe for Hayward CAT and HCC series chemical automation. The 24-inch cable suits compact installations where the flow cell and controller cabinet are side by side. Measures oxidation-reduction potential continuously; the CAT controller uses this millivolt signal to trigger and shut off chlorine dosing in a closed loop. No adapters or controller reconfiguration required after swap. Install in a flow cell or bypass sample cell on the return line, downstream of filtration and chemical injection. 24-Inch vs. 10-Foot Cable: Which Length Do You Need? Measure the routed cable path from the flow cell ORP port to the controller's ORP input terminal before ordering. The 24-inch version is appropriate when that distance is 18 to 22 inches with service slack. For longer runs, use the 10-foot version (W3PRO25-10). Never splice or extend this cable. Hayward CAT ORP Probe 24-Inch Specifications SKU W3PRO25-2 Measurement ORP (oxidation-reduction potential), millivolts Cable Length 24 inches (2 feet) Connector BNC Body 1/2" NPT injection-molded ABS Compatible Controllers CAT1000, CAT3500, CAT4000, CAT5000, CAT5500, HCC1000, HCC2000 Verification Compare controller display against portable ORP meter; within 10 to 20 mV is acceptable Installation Flow cell or bypass sample cell on pool return line, after filtration Best-Fit Installation Compact equipment rooms; controller and flow cell in close proximity ORP Target (commercial) 650 mV or above per CDC Model Aquatic Health Code Replacement Interval Every 12 to 24 months Warranty 2-year Frequently Asked Questions What is the difference between this probe and the 10-foot cable version? The sensing element, electrode material, and BNC connector are identical. The only difference is cable length. Measure the routed cable path before ordering; use the 10-foot version (W3PRO25-10) if the run exceeds 22 inches. Does the CAT controller need to be reprogrammed after a probe swap? No. ORP setpoints and dosing parameters remain in effect. After installation, verify the reading against a portable ORP meter and adjust the controller's ORP offset if a small consistent discrepancy is present. Should I replace the pH probe at the same time? Replacing both probes at the same service interval is the most efficient approach and renews the full sensor pair simultaneously. When should I use the gold tip version instead? The gold tip (W3PRO25-AU-2) is better suited to indoor pools, therapy pools, and high-bather-load facilities where elevated combined chlorine is a recurring issue. For standard outdoor commercial pools with well-balanced chemistry, this standard platinum version is appropriate. Hayward CAT Controller ORP Probe 24-Inch Manual and Warranty Info Installation & Flow Cell Plumbing Guide (PDF) Millivolt Verification & Offset Adjustment Procedure (PDF) ORP Probe Cable Length Selection & Equipment Room Routing Guide (PDF) { "@context": "https://schema.org/", "@type": "Product", "name": "Hayward CAT Controller ORP Sensor Probe 24 Inch Cable Pool Controls", "brand": { "@type": "Brand", "name": "Hayward" }, "description": "OEM ORP replacement probe for Hayward CAT and HCC series chemical automation pool controls. SKU W3PRO25-2. 24-inch cable for compact equipment rooms, BNC connector, 1/2\" NPT ABS body. Compatible with CAT1000, 3500, 4000, 5000, 5500, HCC1000, HCC2000. 2-year warranty. Recommended replacement every 12 to 24 months.", "sku": "W3PRO25-2", "category": "Pool Controls", "offers": { "@type": "Offer", "availability": "https://schema.org/InStock", "priceCurrency": "USD", "seller": { "@type": "Organization", "name": "Your Store Name" } } }
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