VG200 is the state of the art digital electronic vacuum gauge designed to accurately monitor the entire evacuation process from start to finish. The VG200 has been designed to be rugged and reliable. The VG200 incorporates 2 keys and a LCD display. One key simply turns the unit ON and OFF. The other key allows the user to change between MICRONS, MILLIBAR, TORR and INCHES HG VAC any time during the operation of the unit. An advanced ambient compensating design automatically compensates for varying temperature conditions with no manual adjustments needed.