AHT20 Temperature Humidity Sensor PLC RS485 Temperature Sensor for Touch Panel Industrial System DC 4.5‑15V Item Type: AHT20 Temperature Humidity Sensor  Material: ABS Working Voltage: DC 4.5-15V Working Current: 4-7MA Communication Protocol: For RTU protocol, 03, 04 read instructions, 06, 16 write instructions. Serial Port Baud Rate: 9600 (default), no parity, 8 data bits, 1 stop bit. Device Address: The default is 0 x 01. By modifying the 485 address, a maximum of 247 modules can be cascaded (if there are more than 16, please use RS485 repeaters). Function: Read the temperature and humidity values of AHT20 AHT20 Sensor Specifications: Item Type: AHT20 Temperature and Humidity Sensor Temperature Accuracy: The typical value is ± 0.3 ℃, and the maximum value is ± 1.5 ℃. Temperature Range: -40 ℃ to +85 ℃ Humidity Accuracy: ± 2% RH, maximum ± 6% RH Humidity Range: 0 to 100 percent RH