The complete apparatus mounted on a aluminum extrusion stand with stable rectangular base. A meter rule graduated 0-100cm × 1mm, reading in both directions, is fixed on the stand for reading the levels directly. Mercury reservoir tube mounted on vertical support rod, can be positioned anywhere along the length of the rod.
It Can also be used as Boyle’s law apparatus by using a glass tube with one end closed mounted on a slider that slides vertically in slot provided alongside meter rule. Complete with pressure rubber tubing and set of 2 glass tubes. Supplied without mercury.