Digital Manometer, Maximum Pressure 100 psi, Minimum Pressure 0 psi, Accuracy +/-0.3 Percent of Full Scale, Process Connection Size 4/25 in, Process Connection Type Hose Barb, Batteries Included Yes, Digital Display Features 4 Digit LCD, NIST Traceable Certificate No, Series DM8200, Auto Power Off Yes, Batteries Required Yes, Battery Type 9V, Calibration Certificate Included No, Data Hold Yes, Display Units bar, cm H2O, ft H2O, in H2O, in Hg, kgcm2, kPa, mbar, mm Hg, oz/in2, psi