The KMC Controls STE-1412 is a high-precision 12' copper averaging duct sensor designed for accurate temperature monitoring in large commercial air handling units and ductwork. Utilizing a 10,000 ohm Type III thermistor, this sensor provides reliable resistance data to BAS and HVAC controllers, ensuring optimal thermal management across the entire duct cross-section. The bendable copper probe features a 5/16-inch O.D., allowing technicians to serpentine the element across the airflow to eliminate "hot spots" or stratified air layers that single-point sensors might miss. Engineered for industrial-grade durability, the STE-1412 incorporates multiple sensing elements within the 12-foot rigid copper tube, which are electrically averaged to provide a single output. This duct averaging temperature sensor is compatible with any system accepting a 10K-T3 thermistor curve, including KMC, Andover, and Delta systems. Its 22 AWG wire leads and robust plastic utility box enclosure simplify HVAC sensor installation while maintaining signal integrity in high-vibration environments. For contractors managing large-scale air distribution, this component is essential for preventing coil freeze-up and ensuring precise discharge air control. Key Benefits 10K Ohm Type III Thermistor: Provides high-accuracy resistance output with a standard 10K-T3 curve for broad controller compatibility. 12-Foot Averaging Element: Eliminates measurement errors caused by air stratification in large air handlers and supply ducts. Durable Copper Probe: The 5/16" bendable copper probe allows for custom serpentine routing to capture a true average temperature. Enhanced HVAC Efficiency: Delivers precise data to the controller to optimize fan speeds and heating/cooling stages. Reliable Enclosure: Features a rugged utility box to protect wire terminations and ensure long-term stability in mechanical rooms. Common Questions How do I install the STE-1412 in a large duct? For the most accurate average, the 12-foot copper probe should be installed in a serpentine pattern across the air stream. Use mounting clips or wire ties to secure the copper tubing, ensuring it covers the majority of the duct's cross-sectional area to account for temperature variances. Is the KMC STE-1412 compatible with non-KMC controllers? Yes, as long as the controller is configured to read a 10K Ohm Type III thermistor signal. This is a standard curve used by many leading building automation systems. Can the copper probe be cut if it is too long? No, the copper probe cannot be shortened. Cutting the tube will damage the internal sensing elements and compromise the circuit. If the probe is longer than the duct width, it must be coiled or looped back within the air stream. 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.
