K4721 Digital Manometer Maximum Pressure 100 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 Process Connection Type Compression Batteries Included Yes Digital Display Features 4 Digit LCD NIST Traceable Certificate No Series 477B Alarm Yes Application Air Compatible Gases