Discharge Over a Notch
Product Code : LSK-FM-10455
Discharge Over a Notch apparatus (SKU LSK-FM-10455) shows how weirs act as simple flow regulators and flow meters. Fitted on top of the Digital Hydraulic Bench, it lets students relate upstream water level to discharge for two V-notch weirs and a rectangular notch, then compare results with theory. Made by Science Lab Supplies at its manufacturing unit, Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, it is sold without intermediaries to engineering colleges, polytechnics, contractors and distributors.
Specifications
The body is a moulded tank whose middle section forms a channel; one end is wide to receive water from the bench and the other is deeper so the discharge is easy to see. Each weir plate fits a sealed groove in the channel, and an adjustable depth gauge on a beam measures the free surface.
| Parameter | Value |
|---|---|
| SKU | LSK-FM-10455 |
| Weirs | Two different V-notch weirs; one rectangular notch weir |
| Tank | Moulded, with central channel, wide inlet end and deeper exit end |
| Weir mounting | Sealed groove in the channel section |
| Level measurement | Adjustable depth gauge on a beam across the channel |
| Construction | Plastics and corrosion-resistant finishes |
| Water supply | Digital Hydraulic Bench (available separately) |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Discharge Over a Notch Apparatus
The apparatus is used to find how discharge over a notch depends on the head above its crest, and to compare V and rectangular shapes. Students plot discharge against head, and the logarithms of both, to obtain the exponent and discharge coefficient for each notch, a classic set of fluid mechanics lab experiments.
- B.E./B.Tech civil engineering: calibration of rectangular and V-notches.
- Coefficient of discharge and the head-discharge law from log plots.
- Comparing two V-notch angles with a rectangular notch.
- Diploma civil and irrigation courses: weirs as flow-measuring structures.
Standard Scope of Supply
The set comprises the moulded tank and channel, two V-notch weirs, one rectangular notch weir and the adjustable depth gauge with its beam. The Digital Hydraulic Bench, which supplies the water and measures the discharge, is available separately.
Packing, MOQ and Lead Time
Request a price for a single unit or for several to run alongside each hydraulic bench. We quote the packing, delivery time and price for the exact quantity, and other engineering lab equipment in India, including benches and weir sets, can appear on the same quotation.
Holding an Importer-Exporter Code as a registered exporter, Science Lab Supplies can ship to buyers in Uganda, the UAE, Saudi Arabia, Oman, the Philippines and Nepal. Reach the team through the contact page, list what you need in the enquiry cart, or use the lab tender page when the purchase is part of a tender.
Frequently Asked Questions
Which notches come with the Discharge Over a Notch apparatus?
Two different V-notch weirs and one rectangular notch weir are included. Each fits a sealed groove in the channel.
Is a hydraulic bench required?
Yes. The apparatus fits on top of the Digital Hydraulic Bench, which feeds water to the wide end of the tank and measures the discharge. The bench is available separately.
Is Science Lab Supplies the manufacturer or a trader?
Science Lab Supplies manufactures the tank and weirs in Saha, Ambala, India. As the maker rather than a trading house, it sends price and delivery terms straight from its factory.
How is the head over the notch measured?
An adjustable depth gauge on a beam across the channel measures the free water surface upstream of the weir.
Related Weir and Open-Channel Equipment
These items cover the same open-flow topic from other angles: a larger notch set with extra profiles, the bench that feeds this tank, an orifice tank for discharge through openings, and a narrow channel for visualising flow over weirs and gates. All four can share one quotation.
- Notched Weirs — holder with standard notches plus a Cipoletti (trapezoidal) notch.
- Digital Hydraulic Bench — mobile bench with sump tank and digital flow display.
- Flow Through an Orifice — discharge, energy loss and jet contraction.
- Flow Visualisation Channel — 15 mm acrylic channel with dye injectors.
Browse the full Fluid Mechanics range or all engineering laboratory equipment.
Last updated: 25 September 2026
