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Center of Pressure
The Center of Pressure apparatus (Product Code: SLE/EFM/28) is a pivoted clear plastic assembly that students use to find the centre of pressure on a plane surface when it is totally or partially submerged in water. A clear quadrant mounted on a vertical panel holds the water, a scale shows the head, and weights hung from a lever arm balance the hydrostatic moment. Compact and self-contained, it is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, for hydrostatics practicals in engineering colleges, polytechnics and other buyers of mechanics lab equipment.
Key Details
| Parameter | Detail |
|---|---|
| Type | Pivoted centre of pressure (hydrostatic force) apparatus |
| Construction | Vertical panel holding a clear plastic quadrant, to which water is added |
| Head indication | Scale on the panel showing the head of water |
| Quadrant markings | Engraved lines to help set the plane surface vertical or at an angle |
| Quadrant geometry | Cylindrical sides with their central axis coincident with the moment measurement axis, so pressure on the curved faces exerts no moment about the pivot |
| Moment measurement | Weights suspended from a lever arm |
| Test conditions | Plane surface fully or partially submerged |
| Format | Compact, self-contained unit suited to classroom demonstrations |
Typical Use
The experiment works because of the quadrant's shape. Its curved sides are centred on the pivot, so the water pressure acting on them passes through the pivot and produces no turning effect; the only moment left is the one from pressure on the flat test face. Students add water in stages, read the head from the panel scale, and restore balance by adding weights to the lever arm. From the balancing moment they calculate the hydrostatic thrust and the depth of the centre of pressure, then compare it with the theoretical value for a partially submerged face and, once the water covers the face completely, for a fully submerged one.
Using the engraved lines, the plane can also be set at an angle to study inclined surfaces, a useful extension for civil and mechanical engineering groups. Level the panel before starting, add water gently to avoid splashing onto the balance side, and drain and dry the quadrant after the session to keep the clear plastic free of marks. The unit is a practical choice of lab equipment for college fluid mechanics courses that need a bench-top hydrostatics experiment.
Manufacturer
This apparatus comes from Jain Scientific Equipments Private Limited, an Ambala, Haryana manufacturer operating under the ScienceLab brand. For tender and vendor registration forms, the company's GSTIN is 06AAECJ8618A1ZT and its Legal Entity Identifier (LEI) is 3358004HRD1JIVXKYX49. More about the business is on our company profile.
Related Fluid Mechanics Equipment
Useful additions for a hydrostatics and pressure practical:
- Pressure Measurement Bench — manometers and Bourdon gauges for the pressure-measurement part of the same module
- Calibration of a Pressure Gauge — a dead-weight tester that relates known forces and areas to pressure
- Hangers with Slotted Weights — extra slotted weights if more balancing increments are needed (check fit with us)
- Measuring Cylinder, Polypropylene — an unbreakable cylinder for adding water to the quadrant in controlled steps
- Bernoulli's Theorem — the natural next step from fluid statics into flowing water
Browse our Fluid Mechanics equipment for further hydraulics apparatus.
Frequently Asked Questions
Why do the curved faces of the quadrant not affect the result?
Their central axis coincides with the moment measurement axis, so the fluid pressure on them produces no moment about the pivot. The measured moment comes only from pressure on the plane test surface.
Can inclined plane surfaces be tested?
Yes. Engraved lines on the quadrant help students hold the plane either vertical or at an angle.
Are the balance weights included?
The moment is measured with weights on a lever arm, but the weight set supplied is not detailed in our current description. Please contact us to confirm contents.
Does it need a water supply or hydraulic bench?
It is a self-contained unit; water is added directly to the quadrant, so a simple container or measuring cylinder is enough.
How should the clear plastic parts be cleaned?
Drain after use and wipe with a soft cloth and plain water; avoid abrasive pads or solvents, which can scratch or cloud clear plastics.
Is a calibration certificate or warranty provided?
Both are handled per order. Discuss certificate needs with us, and the warranty period will be stated in your quotation.
Can several units be ordered for a class?
Yes, multiple sets can be supplied for colleges and institutes across India and international markets; share the quantity when you enquire.
Request a Quote
Ask for a quotation on the Center of Pressure apparatus through our contact page, or collect several items in the enquiry cart and send them together.
Last updated: 24 September 2026
