Monitors evacuation procedures from start to finish. Because of strict NIST standards and continuous calibration testing, the VG200 Digital Vacuum Gauge earned a reputation of being best-in-class for its accuracy and reliability. A simple 2 button operation gives the flexibility to select or change units: MICRONS, MILLIBAR, TORR and INCHES/HG quickly during any procedure. It will also automatically compensate for varying temperature conditions, with no manual adjustments necessary.