The CJZ5 gas drainage multi-parameter measuring instrument is used to measure parameters such as flow rate, pressure, temperature, methane, and carbon monoxide within gas drainage pipelines. It features automatic conversion to standard condition flow rate values and can display key data such as flow rate, temperature, pressure, methane, carbon monoxide, date, time, pipe diameter, as well as cumulative values for mixed and pure quantities on the same screen. With Bluetooth communication capabilities, it allows for parameter setting, device operation, and data display through mobile terminals. Additionally, it supports LORA wireless communication, enabling wireless deployment.