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Quick overview
- Factory original Hayward The genuine Hayward replacement sensor, part number W3PRO25-2.
- Replaces PRO25-2 Supersedes the earlier PRO25-2 part number.
- 24 in. cable Supplied with a 24 inch cable.
- 2 year sensor The Pro Series 2 year ORP sensor.
- For CAT controllers Built for Hayward CAT chemical controllers.
- ORP measurement Reads oxidation reduction potential, the value the controller uses to judge sanitizer activity.
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Product details
The Hayward W3PRO25-2 is the Pro Series 2 year ORP sensor with a 24 inch cable, built for Hayward CAT controllers. It is the factory original Hayward part and it replaces the earlier PRO25-2.
What the sensor does
ORP stands for oxidation reduction potential. It is not a measure of how much sanitizer is in the water but of how hard that sanitizer is working, which is the number a controller needs in order to decide when to feed. The probe sits in a flow cell in the sample line and reports continuously.
When to replace it
ORP probes are consumable. The sensing surface ages, the response slows and the reading drifts, usually gradually enough that the controller keeps dosing to a number that no longer means what it did. If a probe will not hold calibration after cleaning, it is finished. This one is rated as a 2 year sensor.
| Brand | Hayward |
|---|---|
| Manufacturer part number | W3PRO25-2 |
| UPC | 0610377389853 |
| Type | ORP sensor |
| Series | Pro Series |
| Sensor life | 2 year sensor |
| Cable length | 24 in. |
| Replaces | PRO25-2 |
| Fits | Hayward CAT controllers |
| Shipping weight | 1 lb |
| Ships | Parcel |
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