Pyrex® Mercury Vacuum Tube Manometers, Corning
These PYREX® mercury vacuum manometer tubes with standard taper stopcock and T-sidearm are enclosed in a round bottom, graduated jacket and is sealed to a stopcock plug. In use, mercury is placed in the inner tube and in the jacket bottom to measure the pressure differential. Not recommended for positive pressure. The legible, red scale ranges fromtop to bottom in millimeters (mm). Mercury filling instructions are supplied with each instrument. Uses 5 to 6mL mercury which is not supplied. Scale: 0 = 760mm (Full Vacuum), 80 = 680mm, 160 = 600mm. Material: Borosilicate Glass Code 7740.