MDG-XB model Fire extinguisher Nitrogen and gauge check double usage machine invited by my company can be used to fill the nitrogen and check the pressure gauge. The pressure gauge check device is used by fire protecting factory for the pressure gauge of different steel cylinder and fire extinguisher check. This make the pressure gauge show the exact pressure date. In addition, the gauge check device includes air filling and air release system. It owns many good features, such as easy operation, high capacity, high accuracy and etc.
