Cole-Parmer 68936-82

Replace toxic mercury manometers with these vacuum gauges! Use for monitoring laboratory or industrial vacuum manifolds, pumps, and systems. Large display provides better readability than mercury or liquid manometers. The 760 torr absolute scale measures atmospheric pressure when gauge port is open and reads zero at full vacuum. Rugged epoxy-coated extruded aluminum case and rear cover, ABS/polycarbonate front bezel, front on/off push button, front accessible calibration adjustments.