Digital Manometer, Maximum Pressure 10 psi, Minimum Pressure 0 psi, Accuracy +/-0.1 Percent of Full Scale from 60 Degrees to 78 Degrees F, +/-1 Percent of Full Scale from 32 Degrees to 60 Degrees F, +/-1 Percent of Full Scale from 78 Degrees to 104 Degrees F, Process Connection Size 1/8 in, 3/16 in, Process Connection Type Hose Barb, Batteries Included Yes, Digital Display Features 4 Digit LCD, NIST Traceable Certificate No, Series 477B, Alarm Yes, Application Air; Compatible Gases