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Products  |  Fluid Mechanics and Hydrology  |  Hydrology and Hydraulic Engineering  |  HM 160  |  HM 160.29
HM 160.29 Adjustable Undershot Weir Show data sheet (pdf file) Print page
Technical Description
The undershoot weir is one of the adjustable forms of weir, the water passes underneath the weir gate. The experimental set-up is placed on the side walls of the flume and fixed in place with bolts. The set-up consists of a sturdy unit, a holder for the adjustable weir gate and a scale on which the height of the flow cross-section can be read. Plastic tubular seals inserted in slots on the side of the weir gate complete the experimental set-up. In practice, these simple to construct and thus economical undershot weirs are used to obtain a constant flow from a varying upper water level.
Learning Objectives / Experiments
In conjunction with the HM 160, the following experiments are possible:
· Observation of flow forms
· Observation of the flow under an undershot weir:
- Observation of hydraulic motion on discharge
- Observations on the movement of upper rollers
· Relationship between dam height and discharge

For the exact measurement of water levels, the HM 160.52 Level Gauge is recommended.
Features
· Investigations on an undershoot weir
Specification
[1] Experimental set-up for placing on the HM 160 Multi-Purpose Teaching Flume, lxwxh 140x135x364mm
[2] Weir gate made of aluminium, black anodised, lxwxh 84x15x195mm
[3] Scale for weir gate travel 0..80mm, pitch 1mm
Technical Data
Range of movement of the weir gate: 80mm
Graduations on the scale: 1mm
Dimensions and Weight
l x w x h: 140 x 140 x 370 mm
Weight : approx. 2.5 kg
Scope of Delivery
1 weir, 1 set of accessories, 1 instruction manual
Order Details
070.16029 HM 160.29 Adjustable Undershot Weir
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© 2005 G.U.N.T. Gerätebau GmbH