The Hydrolevel 48-3250-60 Replacement Sensor is the direct 12-inch thermistor sensor assembly engineered for HydroStat 3000 series controllers, specifically models 3150 and 3250. As the updated version of the legacy 48-3150-60, this sensor features a robust dual-thermistor design contained within a stainless steel head to ensure high-precision temperature monitoring and reliable water level detection. When paired with a Hydrolevel Electro-Well, this component enables the critical Low Water Cut-Off (LWCO) safety function; however, it remains fully compatible with standard immersion wells for temperature limit control and Thermal Targeting energy-saving logic. The 12-inch lead length provides ample reach for standard boiler tapping configurations while maintaining signal integrity. For optimal performance, the sensor must be fully seated against the bottom of the well to prevent nuisance lockouts or inaccurate thermal readings caused by air gaps. This replacement HVAC sensor is a vital component for restoring outdoor reset capabilities and warm weather shutdown features in modern hydronic systems. Key Benefits for Technicians: Direct OEM Replacement: Seamlessly replaces the discontinued 48-3150-60 with improved thermal response stability. Dual-Function Capability: Simultaneously monitors boiler water temperature and provides low water detection when used with an Electro-Well. Advanced Logic Integration: Supports Fuel Smart HydroStat features including Thermal Targeting and Thermal Pre-Purge. Universal Controller Fit: Designed for high-performance compatibility with both oil-fired (3250) and gas-fired (3200) HydroStat systems. Rugged Construction: Built to withstand high-temperature hydronic environments without signal drift or degradation. Common Questions & Technical Support: Will this sensor provide LWCO protection in a standard brass well? No, the Low Water Cut-Off function requires the Hydrolevel Electro-Well. In a standard well, the 48-3250-60 will only operate as a temperature limit and boiler reset sensor. How do I resolve a "Snr" error code on the HydroStat display? A "Snr" code typically indicates a disconnected or damaged sensor. Inspect the wiring for interference and ensure the spade connectors are securely seated. If the code persists, the 48-3250-60 replacement is required. Is heat-conducting grease required for installation? No. Hydrolevel specifically recommends against using heat-conducting grease, as it can interfere with the low water cut-off signal. 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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