BTMETER Manometer Gas Pressure Meter, Dual Port Manometro Pressure Differential Gauge Check Air Flow Pressure for HVAC Gas Furnace, Digital Manometer w/Backlight 12 Measure Units

✅【RANGE & Accuracy】BTMETER Pro Gas Pressure Gauge could measure ±2.999psi or ±20.68Kpa with ±0.29%FSO high accuracy and 0.001 resolution, display ambient temperature -40°F~176°F(-40℃~80℃)
✅【Dual Input Port】Based on dual port design, one for checking positive pressure, another for testing negative pressure and use these two port together to get the air pressure difference easily. Comes with two pieces 4mm diameter hoses and standard 1/8 inch hose adapter, practical air pressure tester to check & replace Natural Gas furnace gas valves, diagnose tankless water heater and measure static pressure in ductwork etc.
✅【Zero Out】Supports "return to zero" function, easy to clear out the remainding data and easure you could get an accurate gas pressure measurement reading. A must have for every HVAC tech to check air flow pressure, static pressure or pressure switch during commercial AC air conditioner system installation & maintenance.
✅【Easy to Use】12 gas pressure unit options (mmHg,