NIST Certified Hi-Resolution Differential Manometer w/ Backlit LCD, Digital, 9V, 2.16 psi
02 in WG less than 2 in wc, +/-1 PercentRDG greater than 2 in wc, Process Connection Size 1/4 in, Process Connection Type Hose Barb, Batteries Included Yes, Digital Display Features 4 Digit Backlit LCD, NIST Traceable Certificate Yes, Series EM120B, Alarm No, Application Gas, Auto Power Off Yes, Batteries Required Yes, Battery Type 9V, Calibration Certificate Included NIST, Display Units inWG, mBar, Pa, psi.Digital Manometer, Maximum Pressure 60 in wc, Minimum Pressure -60 in wc, Accuracy +/-0.