Utilizing industrial-grade chips and imported SHT20 high-precision temperature and humidity sensors, this product ensures exceptional reliability, accuracy, and interchangeability. It features an RS485 hardware interface with a protocol layer compatible with the industrial standard Modbus-Rtu protocol. This product integrates both the MODBUS protocol and a common protocol, allowing users to select their preferred communication protocol. The common protocol includes an automatic download function (RS485 connection and serial port setting tool will automatically output temperature and humidity). Key Product Highlights: Industrial grade product with high-performance SHT20 temperature and humidity sensor, and RS485 communication; Integrated Standard MODBUS protocol and common protocol, user-selectable communication protocol; Baud rate is user-configurable; Common protocol features automatic download function with user-settable download speed. Baud Rate Settings: Operating Voltage: DC4-30V (max not exceeding 33V) Max: 0.2W Operating Temperature: -20°C to +60°C, Humidity 0% RH to 100% RH Control Accuracy: Temperature +/- 0.3°C (at 25°C), Humidity +/- 3% RH (at 25°C) Output Interface: RS485 communication (standard MODBUS protocol and custom common protocol), refer to protocol description for details Device Address: Settable from 1-247, default is 1 Baud Rate: Default 9600 (user-configurable), 8 data bits, 1 stop bit, no parity Color: Black Material: Plastic Size: 60x30x18mm Package Contents: 1 * Sensor Only the above package content is included; other products are not. Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowable measurement error is +/- 1-3 cm.