Gas analysis instruments are process analysis meters used to measure the composition of gases. In many production processes, especially those involving chemical reactions, merely relying on physical parameters such as temperature, pressure, and flow rate for automatic control is often insufficient. Due to the wide variety of analyzed gases and the diverse analytical principles, there are numerous types of gas analysis instruments. Commonly used ones include thermal conductivity gas analysis instruments, electrochemical gas analysis instruments, and infrared absorption analyzers, etc.