YEJ-101 rectangle capsule pressure gauge is used to measure minor pressure or negative pressure of gas with no explosive danger, and no carrion impacts to copper alloy, in boiler ventilation equipment. 

YEJ-102 rectangle capsule pressure gauge is used to measure minor pressure or negative pressure of gas with no explosive danger, and no carrion impacts to copper alloy, in boiler ventilation equipment, and its twin line regulation structure can set up the over limit alarm function. 

Specifications 
Accuracy: 2.5 
Ambient temperature: -20-60º C, relative humidity: ≤ 85% 
Power: AC220V 
Consumption: <5W 
Pressure connection: Φ8