This series of instruments uses imported IC which is ultra-power, high accuracy, low drift. It decreases the power consumption. It has strong anti-interference ability and high reaction speed. The pressure display meter is stainless steel and silicone rubber seal so it has the feature of anti-dust, anti-humility and anti-vibration etc. it is widely used in the harsh environment. It is battery-powered and can be used in the places without power supply.