?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. It's used for testing ventilation and air conditioning system£¬ spot check£¬ clean room£¬ or any gas pressure system troubleshooting.? <br><br><strong>Features:</strong> <br>Large LCD backlight display£¬ providing clear reading. <br>11 selectable units for measurement£¬ convenient for use. <br>Max./Min./Avg values£¬ and with a relative time clock. <br>Low battery indicator and pressure unit indicator. <br>Zero adjustment£¬ offset and DIF function. <br>Data hold and automatically shutdown function. <br><br><strong>Specifications:</strong> <br>Display: LCD Backlight <br>InH2O Range: ¡À55.40; Resolution: 0.01 <br>Psi Range: ¡À2.000; Resolution: 0.001 <br>Mbar Range: ¡À137.8; Resolution: 0.1 <br>Kpa Range: ¡À13.79; Resolution: 0.01 <br>InHg Range: ¡À4.07; Resolution: 0.001 <br>MmHg Range: ¡À103.4; Resolution: 0.1 <br>Ozin2 Range: ¡À32; Resolution: 0.01 <br>FtH2O Range: ¡À4.612; Resolution: 0.001 <br>CmH2O Range: ¡À140.6; Resolution: 0.1 <br>Kgcm2 Range: ¡À0.140; Resolution: 0.001 <br>Bar Range: ¡À0.137; Resolution: 0.001 <br>Accuracy: ¡À0.3%FSO(25¡ãC) <br>Repeatability: ¡À0.2%(Max. +/-0.5%FSO) <br>Linearity/Hysteresis: ¡À0.29%FSO <br>Max. Pressure: 10Psi? <br>Response Time: 0.5s Typical? <br>Low Battery Indicator: Yes <br>Over Range Indicator: Err. 1 <br>Under Range Indicator: Err. 2 <br>Operating Condition: 0-50¡ãC / 32-122¡ãF <br>Storage Condition: -10-60¡ãC / 14-140¡ãF <br>Power Supply: 1 * 9V Battery (NOT Included) <br>Item Size: 170 * 55 * 33mm / 6.7 * 2.16 * 1.3in <br>Item Weight: 127g / 4.51oz <br>Package Size: 25.5 * 14 * 6.5cm / 10 * 5.5 * 2.56in <br>Package Weight: 229g / 8.07oz <br><br><strong>Package List:</strong> <br>1 * Digital Manometer <br>1 * Leather Pouch <br>2 * Flexible Tube <br>1 * Metal Accessory <br>1 * User Manual (English)