Applications: H2,3,4 humidity and temperature transmitters are designed for environment monitoring and controlling in industrial, commercial and other buildings. These transmitters can be used for: Humidity and temperature monitoring of supply, exhaust and return air(H2, duct mount) Humidity and temperature monitering in critical environment such as outside air(H3, outside mount) Other applications of immersion humidity and temperature monitoring(H4, separate probe) Features: High performance digital sensors and circuits, ensure accurate measurement and temperature compensation Good long term stability and reliability 100% field changeable sensors, no re-calibration needed Fast response Multiple output signals selectable Industrial design, SS probe and sintered filter High protection rate to IP65 Specifications: Relative Humidity: Sensor: Capacitance polymer Range: 0~100%RH Output: 4~20mA /0~10VDC/RS485 Accuracy: 2%,3%RH(25ípC,20~80%RH) Hysteresis: