HT-1890 Handheld Digital Pressure Gauge Differential Meter Air Pressure Meter 11 Units do Selection Characteristic: 1. Large backlit LCD display for clear reading. 2. 11 units do choice, convenient to use. 3. Values of max. /min./medium and with relative time clock. 4. Zero adjustment, offset and DIF function. 5. Data retention and automatic shutdown function. Specification: The meter can conveniently measure the pressure difference. It has 11 selectable units of measurement and is used do test ventilation and air conditioning systems, spot control, cleanrooms or troubleshoot gas pressure systems. Features: Large backlit LCD display for clear reading. 11 units do choice, convenient to use. Values of max. /min./average and with relative time clock. Low battery indicator and pressure unit indicator. Zero adjustment, offset and DIF function. Data retention and automatic shutdown function. Specification: Model: HT -1890 Display: LCD Backlight Range InH2O: ±55,40; Resolution: 0,01 psi range: ±2.000; Resolution: 0,001 mbar range: ±137,8; Resolution: 0,1 Kpa Range: ±13,79; Resolution: 0,01 InHg Range: ±4,07; Resolution: 0,001 MmHg Range: ±103,4; Resolution: 0,1 Ozin2 Range: ±32; Resolution: 0,01 Range FtH2O: ±4,612; Resolution: 0,001 Range CmH2O: ±140,6; Resolution: 0,1 Kgcm2 Range: ±0,140; Resolution: 0,001 Bar Range: ±0,137; Resolution: 0,001 Accuracy: ±0,3% FSO (25°C) Repeatability: ±0,2% (max. /-0.5% FSO ) Linearity/hysteresis: ±0,29%FSO Memory clock speed Pressure: 10 psi Response time: typical 0,5 s Low battery indicator: yes Over Range Indicator: Err. 1 Indicator below range: Err. 2 Operating conditions: 0~50°C / 32~122°F Storage conditions: -10~60°C / 14~140°F Size: 16*5,5*3,2 cm/6,3*2,2*1,3 inch Weight: about 268 g/9,5 oz List of packages: 1 * digital pressure gauge (battery not included) 1 * Black case 4 * flexible tube 1 * metal akcesoria 1 * User Manual (English)