Velocity Boiler Works (Crown) 240012 Sensor

The Velocity Boiler Works 240012 Sensor is a precision-engineered NTC (Negative Temperature Coefficient) thermistor designed for high-accuracy water temperature monitoring in hydronic heating systems. As a critical OEM replacement part, this Sensor NTC - AH provides real-time resistance feedback to the boiler control board, enabling precise modulation of fuel flow and circulating pump operations. The thermal sensing element features a non-linear resistance-temperature relationship, where resistance decreases as water temperature rises, ensuring high resolution and rapid response times during heavy heating loads. Built to handle the demanding environments of Crown boiler systems, this sensor is essential for maintaining operational safety and preventing soft lockout fault codes (such as Supply Sensor Faults) caused by impedance drift or shorted circuits. Integrating this boiler temperature sensor ensures the control logic receives accurate data to optimize heating system efficiency and equipment longevity.

• OEM Compatibility: Specifically designed for Velocity Boiler Works (Crown) boilers, ensuring seamless integration with existing control boards and wiring harnesses.
• High Sensitivity: Optimized NTC technology provides rapid detection of minor temperature fluctuations for tighter system modulation.
• Rugged Construction: Engineered to withstand the thermal cycling and moisture typical of industrial and residential hydronic boiler environments.
• Safety Optimization: Critical for monitoring boiler water temperature to prevent overheating conditions and ensure reliable safety shut-off protocols.

• Wait, can I use a standard RTD sensor instead? No. This is a Negative Temperature Coefficient (NTC) thermistor. Unlike RTDs, which increase in resistance with heat, this sensor’s resistance drops. Using the wrong sensor type will cause the control board to misread temperatures and likely prevent the boiler from firing.
• How do I know if my existing 240012 sensor is failing? Common symptoms include erratic boiler behavior, short-cycling, or specific error codes like "Sensor Out of Range" or "Unreliable Sensor." You can verify the health of the thermal sensor by measuring its resistance with a multimeter and comparing it against the manufacturer’s ohm chart.
• Is this sensor used for supply or return temperature? While specific applications vary by model, the 240012 Sensor NTC - AH is frequently used as a supply sensor to monitor the water leaving the heat exchanger, providing the primary data for the modulation logic.

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.