Lowest Price Guaranteed! This Temperature Sensor made by Optimum Pool Technologies is specifically designed to replace the sensors used in Hayward®/Goldline® Systems. This product is NOT manufactured by Hayward® – it is a generic replacement made by Optimum Pool Technologies. This sensor isn't just for the water temperature; this aftermarket temperature sensor from Optimum can be used as a water, air, and solar temp sensor for a variety of Hayward® Goldline® systems. Features: Compatibility: Aqualogic®, AquaPlus®, ProLogic®, and many other Hayward® automation systems Generic Replacement for: Hayward's® GLX-PC-12-KIT, AQ-SOL-LV, and AQ-SOL-LV-TC; Goldline’s GL-30, GL-235, GL-235 LV, and GL-235 LV/HV; and the Goldline® PC-10K Includes 10K thermistor and 15-foot cord To use as a water temperature sensor: Attach the sensor to the PVC pipe, securely attaching it to the 3/8-inch opening between the filter pump and the filter using a hose clamp. To use as an air temperature sensor: Set and secure the sensor outside the power center away from heat sources and air conditioners. To use as a solar temperature sensor: Mount the sensor using adhesive or a screw. For unglazed panels, the sensor should be adjacent to the panels; for glazed panels, suspend the sensor between the collector and glazing. Specifications: Manufacturer: Optimum Pool Technologies, Inc. Model: TEMPS-H-10K Shipping weight: 2 lbs.