Utica-Dunkirk FE3980C040 Temperature Sensor

The Utica-Dunkirk FE3980C040 Temperature Sensor is a precision-engineered immersion-style thermistor designed for high-accuracy thermal monitoring in hydronic heating applications. Built with a rugged stainless steel housing and standard NPT thread mounting, this sensor provides a reliable analog (4-20 mA) output signal for seamless integration with modulating boiler controls and building automation systems. Field technicians recognize this as a critical HVAC replacement part for maintaining tight setpoint differentials and preventing short-cycling in high-efficiency Utica gas boilers and Dunkirk heating systems. The low-latency 2s response time and ±1.0% accuracy rating ensure real-time data acquisition for water temperature regulation, directly impacting overall combustion efficiency and system longevity. Whether you are performing routine maintenance or troubleshooting a lockout, the FE3980C040 offers the industrial-grade durability required for demanding mechanical rooms.

• Enhanced Compatibility: Direct-fit OEM temperature sensor for a wide range of ECR International boiler models.
• Fast Response: Features a high-sensitivity thermistor element with a 2-second response time for precise modulation.
• Industrial Build: Corrosion-resistant stainless steel construction ensures long-term performance in high-temperature environments.
• Error Reduction: Reliable ±1.0% accuracy helps eliminate false readings that cause unnecessary system lockouts.

Common Questions

What are the ohmic resistance values for the FE3980C040?
This sensor utilizes a standard resistance curve compatible with most ECR International HVAC controls. At 77°F (25°C), the sensor typically registers in the 10k-ohm range, though you should verify against the specific resistance chart in your unit's technical manual.

Can I use this sensor in commercial steam applications?
While the NPT thread and stainless steel body are durable, this part is primarily engineered for hot water boiler systems. Always verify the maximum temperature limits and output signal requirements of your controller before installation.

How do I troubleshoot a suspected faulty sensor?
Disconnect the sensor and measure the resistance with a multimeter. Compare your reading to the ambient temperature at the probe. If the resistance shows an open circuit or is significantly out of range based on the OEM chart, the sensor likely requires replacement.

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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.