Capsule Pressure gauge (Micro pressure gauge) is mainly used for measuring KPa grade pressure, measuring micro pressure and negative pressure of copper corrosion, is suitable for gas combustion equipment, coating equipment and gas heating system, gas pipeline engineering such as boiler ventilation, gas pipe combustion equipment, field indication of weak gas liquid pressure below 0.5 Kg / cm2, such as regulating box, burner, boiler, oven, oven, kitchenware and other industrial equipment gas measurement display instrument.