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Hydrostatic Pressure & Centre of Pressure Apparatus (SMT-FM-04C)

The Hydrostatic Pressure & Centre of Pressure Apparatus (SMT-FM-04C) is designed to demonstrate the principles of hydrostatic pressure in liquids at rest. Hydrostatic pressure, which is the force exerted by a fluid in a confined space, plays a vital role in many areas of engineering, including shipbuilding, hydraulic engineering, and building services. This apparatus enables students and researchers to carry out experiments that illustrate the effects of hydrostatic forces on immersed surfaces.

The unit consists of a quadrant mounted on the arm of a balance scale that pivots around a fixed axis. When the quadrant is partially or fully immersed in the water tank, the fluid pressure acting on the flat rectangular surface generates a turning moment about the axis. An adjustable counterbalance is fitted to the swinging arm, allowing users to achieve equilibrium and calculate the center of pressure accurately during experiments.

The water tank is equipped with adjustable supporting legs for proper leveling and a drainage valve for convenient emptying after use. A graduated scale indicates the water level inside the tank, ensuring precise measurements during experiments. This setup provides a clear and practical demonstration of fundamental fluid mechanics concepts related to hydrostatic forces and pressure distribution.

Water tank:

  • Transparent PMMA.
  • 6.0 L

Inclination angle of quadrant: 0o to 30o

Distance between the suspended masses and support point: 300mm approx.

Total Depth of submerged quadrant: 165mm

Height of the support point on the quadrant: 100mm

Weights:

  • 2x 0.5N.
  • 4x 1N.
  • 2x 2N.
  • 1x 2.5N.

LxWxH: 500x4350x400 mm.

Weight: approx. 6kg.

Accessories (Included):

  • Instruction Manual

Operating Conditions:

  • Laboratory Temperature: 5oC to 40oC

Note:

  • This product may produce small splashes of water in use, so you must use it at a safe distance from electrical supplies. ESOLS recommends approximately 2.0 m. 
  • Study of the relationship between hydrostatic force and head of water for a fully and partially submerged vertical and inclined plane body.
  • Pressure distribution along an effective area in a liquid at rest.
  • Determination of the centre of pressure and centre of area.
  • Comparison of actual and theoretical hydrostatic force on a fully or partially submerged plane for any given head of water.
  • Determination of the center of pressures with partially submerged.
  • Determination of the resultant force with partially submerged.
  • Determination of the center of pressures with totally submerged.
  • Determination of the resultant force with totally submerged.
  • Balance of momentum. 


  • To be used for finding centre of pressure of a totally or partially submerged plane surface.
  • Tiltable quadrant with fill level scale.
  • Clear Transparent PMMA Construction.
  • Stand-alone apparatus just needs clean water.
  • Investigation of the hydrostatic pressure in fluids at rest.
  • Lever arm with different weights.
  • Anti-corrasion structure.
  • Have adjustable levelling feet.
  • Can be used with Base Water supply ESOLS Hydraulic Bench (SMT-FM-100).