Feature:1. Digital display differential pressure gauge, rubber hose can be easily sleeved, convenient for measurement.2. 13 kinds of pressure units are selected to meet the measurement requirements of different countries and regions.3. With a USB interface, it can be connected to a computer, and the data transmission is faster.4. Air pressure gauge, 0.5S quick response, high sensitivity, accurate measurement, compact and portable.5. Widely used to measure the pressure of fans and blowers, filter resistance / wind speed / furnace pressure / orifice pressure, etc.Specification:Item Type: Differential Pressure GaugeMaterial: ABSMeasuring Range: 100kPaAccuracy: 0.3%FSO (25)Repeatability: 0.2% (Maximum +/-0.5% FSO)Linearity/Hysteresis: 0.29% FSOResponse: 0.5S TypicalLow Battery Indicator: SupportOverload Indication: Err1Downward Overload Indication: Err2Working Temperature: 0-50Storage Temperature: -10-60Power Supply: 4 x 1.5V AAA Battery (Battery Not Included)USB Communication: SupportModelUnitRangeResolutionMaximum PressureGM522bar10.0014GM522mbar10000.14000GM522kPa1000.01400GM522kgf/cm1.0190.0014.078GM522mmHg7500.13000GM522cmHO10190.14078GM522Ozf/in227.50.01910.2GM522pSi14.50.00158.01GM522inHg29.520.01118.1GM522inHO401.40.11605GM522ftHO33.450.01133.8How to Use:1. Install the battery 4pcs 1.5V AAA batteries (not included)2. Connect the pressure port to the hose and connect to the unit under test3. Start and measure according to your needs, select the appropriate pressure unit (press UNTS to convert the unit), HOLD (data hold), DIF (difference button), REC (record button).Package List:1 x Differential Pressure Gauge (Battery Not Included)1 x USB Cable4 x Plastic Tube1 x CD1 x Manual