Nitrogen controller usually consists of pressure regulator, flowmeter and other related components. Its main function is to monitor and adjust the pressure and flow of nitrogen to ensure the stability and controllability of nitrogen supply. Nitrogen controllers are usually used in various applications, such as laboratory atmosphere control, atmosphere protection in industrial processes, gas transmission systems, etc. By adjusting the pressure and flow rate, the nitrogen controller can provide the required nitrogen supply and ensure that the pressure and flow rate are constant under specific working conditions. This helps to ensure the normal operation of experiments, processes or equipment and provides the necessary atmosphere. Nitrogen controllers are widely used in many fields, including scientific research, medical equipment, electronic manufacturing, food processing and so on.