Hayward CAT ORP Sensor with 24" Cord | W3PRO25-2

Product Overview The Hayward CAT ORP Sensor with 24" Cord W3PRO25-2 is a genuine Hayward replacement ORP probe designed for pool and spa chemical automation systems. ORP sensors measure oxidation-reduction potential, helping compatible chemical controllers monitor sanitizer activity and support consistent water quality control. This model includes a 24-inch / 2-foot cable, making it ideal for compact installations where the controller and flow cell are close together. Hayward identifies the PRO25-2 as an ORP probe with a 2-foot cable for commercial pool applications, and current retailer listings identify the UPC as 610377389853. Important Cable Length Note Some listings may describe this item as having a 24' cord, but this model is the 24-inch / 2-foot cable version, not a 24-foot cable. Pool Supply Unlimited also notes this correction on its product page. Ideal For Commercial pool chemical automation Pool and spa sanitizer monitoring Hayward CAT controller systems Hayward HCC automated chemical controller systems Replacement of worn or aging ORP probes Compact equipment rooms with short cable runs Service professionals maintaining automated chemical feed systems Key Features Genuine Hayward ORP Replacement Probe The W3PRO25-2 is a factory-original Hayward ORP sensor designed for compatible Hayward chemical controller systems. 24" / 2 ft. Cable This model includes a 24-inch / 2-foot cable, suitable for installations where the sensor flow cell is located close to the controller. ORP Monitoring The sensor measures oxidation-reduction potential, helping compatible controllers monitor sanitizer activity and make chemical feed decisions. Compatible with CAT Controllers This probe is commonly listed for Hayward CAT controller systems, including commercial CAT water chemistry controller applications. Compatible with HCC Controllers Retail and distributor listings describe the PRO25-2 as compatible with Hayward CAT and HCC automated chemical controllers. Heavy-Duty Probe Construction The Professional Series ORP probe is commonly described as a heavy-duty replacement sensor for chemical controller applications. Durable NPT Probe Body Listings describe the probe as having a durable injection-molded NPT body designed for chemical resistance. Helps Support Sanitizer Control A properly functioning ORP sensor helps the automation system maintain more consistent sanitizer control by providing continuous water quality feedback. Benefits The Hayward W3PRO25-2 is a practical replacement part for commercial pool operators and service professionals using automated chemical control. Accurate ORP readings help the controller monitor sanitizer effectiveness, reduce manual guesswork, and support consistent pool water quality. With its compact 24" cable, genuine Hayward fit, and compatibility with CAT / HCC-style chemical controllers, this ORP probe is a dependable choice for maintaining automated pool and spa chemical systems. Specifications Specification Details Brand Hayward Model W3PRO25-2 Alternate Model PRO25-2 SKU W3PRO25-2 UPC / Barcode 610377389853 Product Type ORP sensor probe Sensor Type ORP / oxidation-reduction potential Cable Length 24 in. / 2 ft. Application Pool and spa chemical automation Compatible Controllers Hayward CAT controllers; Hayward HCC automated chemical controllers Common CAT Compatibility CAT1000, CAT3500, CAT4000, CAT5000, CAT5500 Common HCC Compatibility HCC1000, HCC2000 Body Style NPT-style probe body Construction Heavy-duty chemical-resistant probe body Pool Type Commercial pool and spa automation applications Package Quantity 1 sensor Installation Type Sensor probe installation into compatible flow cell / sensor manifold pH Sensor No Temperature Sensor No Professional Installation Recommended Yes Calibration / Verification Required Yes Warranty Manufacturer warranty applies What’s Included Hayward W3PRO25-2 ORP sensor probe 24" / 2 ft. sensor cable Chemical controller is not included. Flow cell, sensor manifold, fittings, and ORP verification solution are not included unless supplied separately by the seller. Professional installation and setup by a qualified pool professional is recommended. Customer-Facing Q&A What does this sensor measure? This sensor measures ORP, which stands for oxidation-reduction potential. ORP is commonly used by chemical controllers to monitor sanitizer effectiveness. How long is the cable? This model includes a 24-inch / 2-foot cable. Is this a 24-foot cord? No. This model is the 24-inch / 2-foot cable version, even though some listings may display “24' cord.” Is this the same as PRO25-2? Yes. W3PRO25-2 is commonly listed as the open-line version of PRO25-2. Is this a pH sensor? No. This is an ORP sensor. pH sensors are separate parts. What systems is this compatible with? This sensor is commonly listed for Hayward CAT controllers and Hayward HCC automated chemical controllers. Does this include the controller? No. This listing is for the ORP sensor probe and cable only. Does this include calibration or verification solution? No. ORP verification solution is not included unless bundled separately by the seller. What is the difference between W3PRO25-2 and W3PRO25-10? The main difference is cable length. W3PRO25-2 has a 24" / 2 ft. cable, while W3PRO25-10 has a 10 ft. cable. What is the UPC / barcode? The UPC / barcode is 610377389853.