Notched Weirs
Product Code : LSK-FM-10440
Notched Weirs (SKU LSK-FM-10440) is a weir set with a holder and notch plates for experiments on the relationship between flow and head, and on how a notch weir measures flow. It works over a range of flows and suits open channel and flow measurement practicals in civil, mechanical and agricultural engineering courses. Science Lab Supplies manufactures the holder and every notch plate at its plant on Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, so institutions, contractors and distributors get the maker's own price.
Specifications
Every notch and part of the weir set appears as a separate row in the table. In short, a holder takes three standard notches, one rectangular and two V-notch, and an advanced set adds a Cipoletti (trapezoidal) notch and a further notch, so several shapes can be tested under the same flow conditions.
| Specification | Value |
|---|---|
| SKU | LSK-FM-10440 |
| Holder | Included |
| Standard notches | 3 |
| Rectangular notch | 1 (standard set) |
| V-notch | 2 (standard set) |
| Advanced set | Cipoletti (trapezoidal) notch and one further notch |
| Flow range | Works over a range of flows |
| Experiment 1 | Relationship between flow and head |
| Experiment 2 | Use of weirs to measure flow |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Notched Weirs
Students measure the head over each notch at several flow rates and plot flow against head, then use the results to find discharge coefficients and to calibrate the weir as a flow meter. Comparing rectangular, V and trapezoidal shapes shows how notch geometry changes the head-discharge relationship.
- B.Tech / B.E. fluid mechanics lab: calibration of rectangular and V-notch weirs.
- Coefficient of discharge for each notch from flow and head readings.
- Diploma irrigation and water supply courses: weirs as open channel flow meters, set against the Venturi, variable area meter and orifice plate of the Flow Meter Demonstration.
- Cipoletti weir work for advanced groups, following the flow over notch experiment on the Hydraulics Bench.
Standard Scope of Supply
Each set comprises the holder, the three standard notches (one rectangular and two V-notch) and the advanced set of notches including the Cipoletti (trapezoidal) plate. The channel or water supply used with the weirs is not part of this item and is quoted separately if required.
Packing, MOQ and Lead Time
Request a quotation for a single weir set or several for student groups; it will show packing, delivery time and price for the quantity you name. Fluid mechanics lab experiments such as gates and spillways can be added to the same quotation.
An Importer-Exporter Code lets Science Lab Supplies ship to buyers in Zambia, Rwanda, South Africa, Qatar, Sri Lanka and Vietnam. The business is registered under Udyam as a manufacturing enterprise (UDYAM-HR-01-0014546) and for GST (GSTIN 06ADEPJ0574F2ZU). Quote requests for the weir set can be typed into the contact page or gathered in the enquiry cart, while bid paperwork is outlined on the lab tender page.
Frequently Asked Questions
Which notch shapes are included?
The standard set has one rectangular and two V-notches, and the advanced set adds a Cipoletti (trapezoidal) notch and a further notch, all used with the same holder.
What can students learn from notched weirs?
They find the relationship between flow and head for each notch, over a range of flows, and see how a weir can be used to measure the flow in an open channel.
Is Science Lab Supplies the manufacturer or a trader?
Holder and notch plates alike come from the Science Lab Supplies factory in Saha, Ambala, India, not from an outside supplier, so the company sells the weir set as its manufacturer.
How is this different from Discharge Over a Notch?
Discharge Over a Notch fits on top of the Digital Hydraulic Bench with two V-notch weirs and a rectangular notch. This set adds the advanced Cipoletti notch plate.
Related Flow Control Models
Weirs, gates, spillways and culverts are the main open channel control structures. These Fluid Mechanics items extend a weir practical into a complete flow measurement and control sequence, and any of them can be listed on the same quotation as the weir set.
- Discharge Over a Notch — moulded tank channel with an adjustable depth gauge.
- Digital Hydraulic Bench — electronic flowmeter with a digital flow-rate display.
- Flow Visualisation Channel — 15 mm wide acrylic channel with weirs and dye injectors.
- Sluice Gate with Tappings — ten tappings across the gate face.
- Spillway — ski jump and apron for energy dissipation studies.
- Radial Sector Gate — head/flow characteristics of a radial gate.
- Culvert — pair of clear models, circular and rectangular.
Browse the full Fluid Mechanics range, the Hydraulics and Pneumatics range, or all engineering laboratory equipment.
Last updated: 22 October 2026
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