The HE-67xx Series Humidity devices house both a humidity and a temperature sensor in a wall or duct-mount style. The humidity sensor is capable of measuring Relative Humidity (RH) over the entire range of 0 to 100%, and its All-Polymer-construction provides improved resistance to chemical corrosion. The TRUERH-product line delivers devices with RH accuracy of either ±2% or ±3% RH. TRUERH-humidity elements produce voltage output signals proportional to measured humidity for humidity indication. Temperature sensors are available in thin-film nickel, thin-film platinum, and silicon. The elements are powered with 14 to 30 VDC or 20 to 30 VAC and feature a user-selectable humidity output of 0 to 10 VDC or 0 to 5 VDC. Product Specifications BRANDJohnson Controls LENGTH INCHES3-1/4 WIDTH INCHES3-1/4 HEIGHT INCHES8-1/4 RH ACCURACY±3 Percent POWER REQUIREMENTS14 to 30 VDC or 20 to 30 VAC at 50/60 Hz, Class 2 LIMITED WARRANTY YEARS1