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Diaphragm
Diaphragm (Product Code: SLE/ETP/13) is a self-contained, bench-mounting apparatus used to investigate how pressure changes the surface profile of a clamped diaphragm and how circumferential and radial strains are distributed across it, in engineering stress-analysis laboratories. Eight strain gauges at different radii and a traversing digital dial gauge let students map strain and deflection on the same plate. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM engineering lab equipment manufacturer, at its own factory in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Type | Self-contained, bench-mounting experimental apparatus |
| Edge condition | Two heavy flanges clamp the edge of the diaphragm to provide built-in edge conditions |
| Pressure medium | Oil in the area directly under the diaphragm |
| Strain gauges | Eight, cemented to the upper surface of the diaphragm in various positions and at different radii |
| Gauge circuits | Each strain gauge circuit is a full bridge with high-stability resistors |
| Strain readout | Signals from each strain gauge shown on a digital display |
| Profile measurement | Digital dial gauge fitted to a digital position indicator, traversed across the diaphragm to measure its surface profile |
| Product code | SLE/ETP/13 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Diaphragm Apparatus Used For?
Flat circular plates under pressure appear in pressure transducers, pump and valve diaphragms, tank ends and inspection covers. Plate theory for a diaphragm with a clamped, built-in edge predicts a dished deflection profile and a radial strain that changes sign between the centre and the edge, while circumferential strain behaves differently. This apparatus lets students see both effects on a real plate.
With pressure acting through the oil beneath the diaphragm, students traverse the digital dial gauge across the surface, noting deflection against position, and read the eight gauges on the digital display. Plotting deflection and each strain component against radius, then overlaying the theoretical curves, makes a strong final-year or diploma practical. Zero the dial gauge and strain readings before applying pressure, and traverse in the same direction each time to avoid backlash.
OEM Manufacturer
This Diaphragm apparatus comes from Jain Scientific Equipments Private Limited, trading as ScienceLab, which acts as its OEM (original equipment manufacturer). It is manufactured at the company's own licensed factory at Saha, Ambala, Haryana, so universities, technical institutes, dealers and importers buy it from the maker rather than from a reseller. Repeat orders and replacement-part queries are handled by the same team; ask us when you need them. Company background is on the profile page.
Related Materials Testing and Properties Equipment
Other pressure and strain experiments that pair well with the diaphragm:
- Thick Cylinder — through-wall radial and hoop strains in a pressurised thick-walled cylinder.
- Thin Cylinder — hoop and longitudinal strain in a thin-walled aluminium cylinder.
- Strain Gauge Trainer — teaches the full-bridge circuits used on the diaphragm gauges.
- Unsymmetrical Cantilever — a deflection-measurement experiment on beams of unsymmetrical section.
Explore the Materials Testing and Properties category for the complete stress-analysis range.
Frequently Asked Questions
What does the Diaphragm apparatus measure?
The Diaphragm apparatus measures how pressure changes the surface profile of a clamped diaphragm and how circumferential and radial strains are distributed across it, using eight strain gauges and a traversing digital dial gauge.
Where are the strain gauges on the Diaphragm?
The Diaphragm has eight strain gauges cemented to its upper surface in various positions and at different radii. Each gauge circuit is a full bridge with high-stability resistors, and the signals are shown on a digital display.
How is the surface profile of the Diaphragm measured?
On the Diaphragm apparatus, a digital dial gauge is fitted to a digital position indicator. Students traverse the dial gauge across the diaphragm and record deflection against position to build up the surface profile under pressure.
What edge condition does the Diaphragm have?
The edge of the Diaphragm is clamped between two heavy flanges, which gives built-in edge conditions. This matches the clamped-edge case in plate theory, so students can compare their results with standard textbook equations.
Who manufactures the Diaphragm apparatus?
The Diaphragm apparatus is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab) as the OEM, at its own licensed factory in Saha, Ambala, Haryana, India, and is supplied directly to institutions and dealers.
What should I include when requesting a Diaphragm quotation?
When requesting a Diaphragm quotation, include the product code SLE/ETP/13, the number of units, your institution name and the delivery destination. Mention any other stress-analysis apparatus you need so we can quote them together.
Request a Quote
For a Diaphragm quotation direct from the manufacturer, write to us through the contact page or place it in the enquiry cart. We serve institutions, dealers and importers across India and international markets.
Last updated: 24 September 2026
