The meter can measure the differential pressure conveniently. It features 11 selectable units of measure: inH2O, psi, bar, mbar, Kpa, InHg, mmHg, ozin2, FtH2O, cmH2O, kgcm2. Its used for testing ventilation and air conditioning system, spot check, clean room, or any gas pressure system troubleshooting.Features:Wide Measurement Range: 0.5s response time, 13.79 kPa / 2 psi / 55.4 H2O measuring ranges with high accuracy.11 Selectable Units for Measurement: including InH2O, Psi, Mbar, kPa, inHg, mmHg, Ozin2, ftH2O, cmH2O, Kgcm2, and Bar, convenient for use.Clear Digital Display: large LCD backlight display, providing clear reading.Data Hold: for easy checking the data and writing it down.User-friendly Indicator: low battery indicator, pressure unit indicator, and Error codes for out of range indication.Other Functions: Max./Min./Avg values, and with a relative time clock, automatically shutdown, zero adjustment, offset and DIF functionSpecifications:Display: LCD BacklightInH2O Range: 55.40; Resolution: 0.01Psi Range: 2.000; Resolution: 0.001Mbar Range: 137.8; Resolution: 0.1Kpa Range: 13.79; Resolution: 0.01InHg Range: 4.07; Resolution: 0.001MmHg Range: 103.4; Resolution: 0.1Ozin2 Range: 32; Resolution: 0.01FtH2O Range: 4.612; Resolution: 0.001CmH2O Range: 140.6; Resolution: 0.1Kgcm2 Range: 0.140; Resolution: 0.001Bar Range: 0.137; Resolution: 0.001Accuracy: 0.3%FSO(25C)Repeatability: 0.2%(Max. +/-0.5%FSO)Linearity/Hysteresis: 0.29%FSOMax. Pressure: 10PsiResponse Time: 0.5s TypicalLow Battery Indicator: YesOver Range Indicator: Err. 1Under Range Indicator: Err. 2Operating Condition: 0-50C / 32-122FStorage Condition: -10-60C / 14-140FPower Supply: 1 * 9V battery (NOT included)Item Size: 170 * 55 * 33mm / 6.69 * 2.16 * 1.30inItem Weight: 127g / 4.51ozPackage Weight: 229g / 8.07ozPackage Size: 25.5 * 14 * 6.5cm / 10.04 * 5.51 * 2.56inPacking List:1 * Digital Manometer1 * Leather Pouch2 * Flexible Tube1 * Metal Accessory1 * User Manual (English)