US Vacuum TORR gauges are HIGHLY ACCURATE, barometrically independent, capsule type (Bourdon tube for 0-1200mm), ABSOLUTE pressure gauges. Each gauge has a dual absolute pressure scale, reading in both millibars (mbar) and Torr (mm Hg). To ensure high accuracy, all bearings are set in jewels, which provide exceptionally smooth pointer movement. Each gauge is individually calibrated at every point on both increasing and decreasing pressure. 
 
All gauges are machined from a solid piece of Aluminum bar stock and anodized for corrosion resistance. Gauges are assembled with an O-ring sealed tempered glass face; inconel sensing element and aluminum pointer & dial plate. Designed and assembled to function on the same principle as aerospace altimeters, these gauges are not affected by local barometric pressure variations. Accuracy is 2% full scale with virtually no hysteresis present. Five (5) ranges are available to meet both laboratory & Industrial applications.