Notched Weirs
Product Code : LSK-FM-10440
Notched Weirs (SKU LSK-FM-10440) is a weir set with a holder and interchangeable 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 fabricates the set in its own factory at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and sells it factory-direct to institutions, contractors and distributors.
Specifications
The set consists of a holder with three standard notches, one rectangular and two V-notch, plus an advanced set of notches that includes a Cipoletti (trapezoidal) notch for further experiments. Each plate fits the holder in turn, so several notch shapes can be tested under the same conditions.
| Parameter | Value |
|---|---|
| SKU | LSK-FM-10440 |
| Standard notches | 1 rectangular, 2 V-notch |
| Advanced notches | Includes Cipoletti (trapezoidal) |
| Holder | Included |
| Experiments | Flow against head; weirs as flow meters |
| 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 why each suits a different flow range.
- 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.
- Cipoletti weir and end-contraction effects for advanced groups.
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). Enquiries are welcome on the contact page or through the enquiry cart, with tender information 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, all fitting the same holder.
What can students learn from notched weirs?
They find the relationship between flow and head for each notch and see how a weir is used to measure flow in channels.
Is Science Lab Supplies the manufacturer or a trader?
The weirs are manufactured by Science Lab Supplies in Saha, Ambala, India, not bought in for resale, so the offer you receive is a factory quotation.
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 are usually taught together with gates and spillways as the main open channel control structures. These four Fluid Mechanics items extend a weir practical into a complete flow measurement and control sequence.
- Discharge Over a Notch — weir apparatus that fits on the Digital Hydraulic Bench.
- Sluice Gate with Tappings — pressure across a gate face, ten tappings.
- Spillway — ski jump and apron for energy dissipation studies.
- Radial Sector Gate — head/flow characteristics of a radial gate.
Browse the full Fluid Mechanics range or all engineering laboratory equipment.
Last updated: 25 September 2026
