For industrial field applications, featuring RS485 bus-based communication. The gas concentration sensor employ a metal oxide (SnO2) process for rapid preheating, high sensitivity, wide response range, and strong adaptability. Analog signals from the gas sensor are amplified, buffered, and filtered through a rail-to-rail op-amp before ADC conversion. The SHT30-DIS and BMP280 chips in the temperature/humidity and atmospheric pressure sensor offer MEMS-based accuracy. Built-in MCU processing and Modbus-RTU registers, data access is simplified. Easy DIN rail or screw mounting installation.