A/RH3-R2 - The A/RH Series Relative Humidity Room Transmitter convert a resistance change to a linear 4 to 20 m 0 to 5 VD or 0 to 10 VDC output. The Advanced Ceramic Technology design overcomes the limitations of other resistance-based humidity sensors that utilize water-soluble polymer coatings. The Advanced Ceramic Technology enables these sensors to recover fully from condensation. This also allows the sensor to maintain its accuracy over a longer period of time. Each A/RH Series humidity transmitter is calibrated using a NIST Traceable Temperature and Humidity Chamber.  The A/RH Series is covered by ACI's Five (5) Year Limited Warranty. ACI roo or wall moun relative humidity sensors are designed for HVAC or Building Automation Systems.  Typical applications include: humidity control offic pharmaceutica school office auditorium museum and hospitals. Single point field calibration Field selectable output signals (0-5 VD 0-10 VD 4-20 mA)