AccuTools BluVac LTE Digital Vacuum Gauge Accutools BluVac LTE Digital Vacuum Gauge 0 to 25,000 Micron Range with 1 Micron Resolution Measures Vacuum in Microns, Pascals, Millibar, Millitorr and mmHg Large, high-visibility back-lit LCD display Calibration Self Test  Can be field calibrated with no special equipment