Flow Over Weirs Accessory

Flow Over Weirs Accessory for Educational Laboratory.

Product Code:


Flow Over Weirs Accessory

Using the supplied weir plates, the measurement of flow rate in open channels can be investigated. They are used together.  Water is fed into a section of channel, the water then flows over the weir into the volumetric tank and back to the sump tank. A weir with a V notch (Thomson weir) and a weir with a rectangular notch are provided for the investigations. A depth gauge for the determination of the weir head is included.

Learning Objectives / Experiments

Together with , the following topics can be addressed:

· Determination of weir head

· Determination of volumetric flow rate


1.   Self-sealing weir panels, 230x185x8mm, manufactured from PVC

2.   Level gauge to determine the weir head

3.   Thomson weir with notch 90°

4.   Square weir, notch w x h 60x50mm

Technical Data

Weir panels made of PVC

- square weir: width of notch 60mm

- Thomson weir: notch angle 90°

Level gauge: measuring range 0…200mm

Dimensions and Weight

l x w x h : 290 x 190 x 290 mm

Weight : approx. 2 kg