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Flow over Weirs and Notches Apparatus (SMT-FM-07-A)

This apparatus is designed for investigating the relationship between the upstream water level and the discharge rate over different sharp-crested weirs. It allows students to perform practical tests and compare their findings with theoretical predictions for both triangular and rectangular notch shapes.

Its design features easily interchangeable plate weirs—triangular, rectangular (and others as required on demand)—that are mounted into a hydraulic bench which supplies a controlled flow of water. A level gauge is included to accurately measure the water head upstream of the weir, which is the essential parameter for determining the theoretical discharge.

The primary application is in educational labs for demonstrating open-channel flow measurement principles. The key benefit is providing hands-on verification of theoretical discharge coefficients, giving students practical insight into a common method used for flow measurement in water management and engineering contexts.

Weirs:

Material: Stainless Steel/Melamine

Self-sealing.

Rectangular Profile:

    o    LxW of the section: 60mm.

V-profile:

    o    Angle of the section: 90°.

Height of the section: 50mm.

Measuring ranges:

  • Head: 0…250mm.
LxWxH: 250x170x1.5mm (weir plates).
Total weight: approx. 4kg.
Accessories (Included):
  • All necessary fittings.
  • Instruction Manual
Operating Conditions:
  • Laboratory Temperature: 5oC to 40oC
Note:
  • This product may produce small splashes of water in use, so you must use it at a safe distance from electrical supplies. ESOLS recommends approximately 2.0 m. 
  • Study of head against discharge.
  • Study of Coefficient of discharge.
  • Study of Rectangular and different angled V-notches.
  • Investigation of characteristics of flow over rectangular and V-notches.
  • Comparison of theoretical and measured discharge.
  • Compact size apparatus.
  • Easy to operate and understand.
  • Corrosion proof weirs.
  • Discharge measurement in open channels using 3 measuring weirs.
  • Two Weirs with V-profile.
  • One Weir with rectangular profile.
  • Level gauge with scale for determining the head.
  • Level gauge can be positioned anywhere along the Experimental flume.
  • Can be used with Base water supply Hydraulic Bench (SMT-FM-100).