Pyrex® Vacuum Manometers, Standard, Corning (CAT#: STEM-AIAE-0057-LKN)

The manometer tube is enclosed in a round-bottom, graduated jacket and is sealed to a stopcock plug, that vents the outer jacket through a side tube in neck. Mercury is placed in the inner tube and in jacket bottom to measure the pressure differential. Not recommended for positive pressure. Mercury not included. Each manometer are supplied with Mercury-filling instructions. Red scale ranges from 0 to 160mm. With ST/NS: stopper. 235 × 25mm O.D.