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Goldline/Hayward ¼ NPT Screw-In sensor
   Model: SC-025
Goldline/Hayward ¼ NPT Screw-In sensor
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Base Price:  $18.41
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    This item is Non-returnable; all sales final.  WARNING:  Threaded Fitting sizes are often confused because the actual size of the threaded section is larger than the “Nominal” size given to name the part; see description and diagram for details.

    pool water sensorHayward ¼ NPT Screw-In sensor (Previously Goldline)

    I.E. 10k Solar Pool Water Sensor 
    The sensor is wired into the system and signals the controller unit with readings on the pool water temperature.

    Product Benefits:
     Maximizes pool temperature

    Product Applications:
    Used to measure temperature of the pool's water
     Used with any Solar Control unit that requires 10K sensors

    Pool water sensor dimensions
Model SC-025 ¼ inch
NPT: the threads are nominal ¼" and actual threads 33/64" tapered to 31/64”. This model is typically used screwed into the ¼” female drain outlet of a pool pump basket.
      Nominal pipe size:
      1⁄4 inch
      Pipe outer diameter:
      0.540 in (13.72 mm)
      Threads per inch: 18
      Thread pitch: 0.05556 in (1.41122 mm)


        National Pipe Thread (NPT)

        Pool Water Sensor application trouble-shooting tips:

        All GoldLine controls including GL35, AquaSol, and GL235 series,
        and all Heliomatic HM Series controls, and most other brands
        incorporate the use of 10k sensors. Some other lesser known
        brands used 3k sensors.

        To determine the type of sensor, the resistance must be measured in ohms using a volt/ohm meter when the sensor is at 77ºF. 

        10k measures 10,000 ohms and 3k measures 3,000 ohms. 
        As the temperature goes up, the resistance goes down. 

        Resistance can be checked at any temperature, and then
        convert the ohm reading measured to the temperature equivalent
        by using the conversion chart. 

        The following manuals give general information that can be used
        for most controls. View installation and troubleshooting for: 

        GL235 Solar Pool Controller

        GL AquaSol Control

        Control units and packages and sensor units can be purchased at: 

        Solar Heaters Parts and Supplies

        download pdf Hayward Warranty

        Product Manufacturer: Hayward Industries, Inc.


        HELP » Contact Customer Support
        Toll-Free help line offering unit sizing support
        Online e-mail technical and installation support


        When purchased with a Solar Pool Heater System Kit. 

        Processing and Delivery Information: Please allow Processing Time as stated above for your order, plus standard transportation delivery time. Orders placed after 2PM EST may not begin processing until the next business day. Please call for Rush Processing and/or Rush Shipping options.

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