This manometer offers high accuracy, performance and repeatability. Having a piezoelectric sensor, it offers user selectable measuring units. It is ideal for applications in industry, laboratories, heating, ventilation and air-conditioning systems for measuring non-corrosive gauge or differential pressures. All instruments feature over range protection to twice the measuring capacity. 11 selectable units: psi, mbar, inH2O, kPa, inHg, mmHg, ozin, ftH2O, cmH2O, kgcm & bar Digital display of positive, negative or differential pressure 2 x 4.5mm barbed lugs for 3.18mm ID tubing Min/max & average measurements Data hold freezes displayed readings 35mm LCD display with backlight and function indicators Impact-resistant ABS plastic case with function buttons Zero, offset and data compensation Overload and underload warning displays Err 1 or Err 2 Auto power off after 25 minutes of no activity can be user disabled Low battery indicator Supplied with 2 x 5mm x 30mm soft connection tubing, 2 x