The diameter at the base of each vessel is common but the shape of each vessel varies; one parallel sided, one conical and one tapering inwards.

The diaphragm, located at the base of the vessel, conveys the force from the water inside the vessel to a lever arm with a sliding counterweight.

This apparatus, designed to demonstrate Pascal’s principle, consists of a machined body incorporating a horizontal flexible diaphragm to which one of three alternative glass vessels can be fitted.

Technical Details:

Conical vessel: 26mm to 101mm inside diameter at top

Tapered vessel 26mm to 9mm inside diameter at top

Parallel vessel: 26mm inside diameter

Diameter at diaphragm: 56mm

Maximum depth of water: 228mm (to top of vessels)

Overall dimensions:

Height: 500mm

Width: 300mm

Depth: 156mm.