Manometer, Professional Air Pressure Meter, Handheld HVAC Manometer 12 Selectable Units Differential Pressure Gauge, Dual-Port Manometer Gas Pressure Tester with Backlight (Included Battery)

?Multifunctional Pressure Gauge?Digital pressure gauge can measure +/-2.999psi or +/-20.68Kpa with an accuracy of +/-0.29%FSO and a resolution of 0.001, displaying ambient temperature of -40°F~176°F (-40?~80?) with high accuracy and wide range , max/min mode and DIF mode ?12 Optional Units? 12 optional units (mmHg, inHg, ftH?O, cmH?O, inH?O, Pa, KPa, mbar, bar, psi, Kgcm² and ozin²) 3 measurement modes (Max, Min. differential DIF) and the simple operation design with 5 buttons help you use this 200g portable differential pressure monitor easily ?Dual Input Ports?There are two ports on the top of the differential pressure monitor, one for testing positive pressure and the other for testing negative pressure, you can choose either port to test the pressure difference between these two areas (P1-P2), equipped with two 4mm diameter hoses and a standard 1/8 inch hose adapter, the practical air pressure tester can be used to check and replace gas valves in natural gas furnaces, diagnose waterless tanks water heaters and measure static pressure in duct systems, etc ?Zero Out?Support "zeroing" function, which can easily clear the remaining data and ensure to get accurate gas pressure measurement readings. Data storage 100 groups, auto shutdown: no operation after about 15 minutes Low battery alert: ? 6.8V [Note] Battery: 1*6F22, 9V, 250mAh ?Easy to Use?Large LCD display prevents eye fatigue and clearly displays differential air pressure readings even in the dark.The professional air pressure gauge is specially designed for gas measurement and calibration, gas pressure system troubleshooting, laboratory testing, maintenance and installation of blowers, clean rooms, boilers and other gas equipment