This is a very reliable humidity transmitter with countless of Features that you will surely need. Adopt imported digital sensor from Switzerland with higher performance and higher precision. Standard guide rail structure design, simple wiring and easy to install. Features: With RS485 bus technology and industrial Mobus-RTU protocol to realize low-temperature and humidity status online monitoring. You don't have to distinguish between positive and negative electrodes and it still work even if connected to the opposite wire. Real-time detect the temperature and humidity condition. Easy to control the temperature and humidity change. Indoor and outdoor temperature and humidity measurement. Temperature and humidity monitoring in vegetable garden, warehouse, industrial field, computer room, laboratories, etc. Specifications: Model: XY-MD02 Material: ABS Plastic Power Supply Range: DC8V48V (No positive and negative polarity distinguish, can be reversed polarity) Power: 0.1W Temperature Measuring Range: -40 125 Humidity Measuring Range: 0 100%RH Measuring Accuracy and Resolution: Temperature: 0.3, 0.1 Humidity: 3.0%, 0.1RH Response Time: 2s Communication Output Interface: Standard RS485, can achieve long-distance communication Serial Baud Rate: 1200, 2400, 4800, 9600 customize by yourself (Two digits dial switch), the default 9600 Byte Format: 8 Data Bits, 1 Stop Bit, No need to check Communication Protocol: Mobus-RTU Communication address can be set: 163 (6 digits dial switch), the default 1 Installation Method: Rail Installation Wide Applications: Temperature and humidity monitoring for industrial field, telecommunication base stations, warehouses, laboratories, factories, production workshops, agriculture greenhouse, computer room, museum, archives, library tube, hospitals, hotels, living quarters, petrochemical bases, power plants, nuclear power plants, substations, agricultural research base, health and epidemic prevention station environmental protection departments. Item Size: 85 * 45 * 30mm / 3.3 * 1.8 * 1.2in Item Weight: 40g / 1.4oz Package Size: 85 * 45 * 30mm / 3.3 * 1.8 * 1.2in Package Weight: 40g / 1.4oz Package List: 1 * Temperature Humidity Transmitter