As a seasoned technician, you know that a failed sensor on a Hydrostat 3250-Plus or similar controller can take down a high-efficiency boiler system at the worst possible time. The Hydrolevel 48-3250-58 Replacement Sensor is a 4-foot (48-inch) thermistor assembly specifically engineered for Hydrostat boiler controllers. This OEM replacement part is critical for maintaining accurate thermal targeting and active low water cut-off (LWCO) functionality. When installed in a Hydrolevel Electro-Well, this sensor communicates directly with the controller's microprocessor to monitor water levels and temperature parameters, ensuring the burner circuit de-energizes during dangerous low-water conditions. The 48-inch lead provides the necessary reach for various boiler jackets and clearance requirements, especially in commercial steam and hot water applications where standard shorter sensors are insufficient. This 48-3250-58 low water sensor replaces worn or drifted probes that cause "false" LWCO lockouts or erratic temperature readings, ensuring the system resets properly and operates at peak fuel efficiency. Key Benefits for the Contractor: Direct OEM Compatibility: Precise match for Hydrolevel Fuel Smart Hydrostat units, including the 3250, 3150, and 3200 series. Enhanced System Safety: Restores reliable communication for low water cut-off protection, preventing dry firing and boiler cracking. Extended REACH: The 4-foot sensor length is ideal for large-well configurations and remote mounting where standard 12-inch probes cannot reach. Easy Field Installation: Standard quick-connect terminal compatibility allows for rapid swap-outs during routine maintenance or emergency service calls. Verified Performance: Designed to withstand the thermal cycling and high-pressure environments of residential and commercial hydronic systems. Common Questions: Does this sensor provide low water cut-off protection in a standard well? No. While it will provide temperature readings in a standard immersion well, the low water cut-off function is only active when the Hydrolevel 48-3250-58 is installed in a specialized Electro-Well. Can I splice or extend the cable length if 48 inches is too short? Yes, the cable can be extended with shielded wire and spade connectors; however, to avoid signal interference, do not run the sensor wire parallel to power lines or high-voltage wiring. How do I test if the new sensor is functioning correctly? Press and hold the Test/Settings button on the controller for 30 seconds. The "Low Water" LED should blink, indicating the sensor has triggered the lockout as intended. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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