The ACI High Accuracy Thermistor Duct Series features a 1/4" diameter stainless steel probe with two, 24 inch 22 AWG Etched Teflon colored lead wires to differentiate the sensor types. The sensors in this series are manufactured using ACI’s proven double encapsulation process to eliminate the effects of moisture on the sensors as well as increased thermal response times from our high quality, thermally conductive epoxy. The duct style sensor is a single point sensor designed to be used in smaller duct applications and includes an insulation pad for properly sealing your duct and to dampen vibration. For best results, the sensor length should be determined by the actual width or diameter of your duct such that the tip of the probe is in the approximate center. Our standard enclosure options are the galvanized single gang junction box “-GD” or plastic duct enclosure with hinged cover “-PB”. On larger ducts, you may want to refer to our Rigid or Bendable Copper Averaging sensor for increased sensing points and better temperature control. This series can be ordered with optional NEMA/IP rated weather proof enclosures and NIST Certificates as referenced in the ordering grid on the back of the product data sheet. Applications: Data Centers, Labs, Hospitals, Clean Rooms, Roof Top Units, Air Handlers, Monitoring Supply/Discharge/Return/Mixed Air