The Vibrating Wire V-Notch Weir System comprises of two elements: V-Notch weir and Vibrating Wire Weir Monitor.
The V-Notch (triangular) Weirs are typically installed in open channels such as streams to determine discharge (flow rate).
The main component is a cylindrical weight suspended from a vibrating wire force transducer. As the water level changes, the changing buoyancy force on the cylinder acts on the transducer. The output from the instrument can be used to calculate the flow rate when read in conjunction with a V-notch weir.
Products & Accessories
Vibrating Wire Weir Monitor
Some of the features of the VW Weir Monitor are:
- Vibrating Wire precision water level sensor
- Simple, low cost and robust instrument
- Accurate and sensitive water level monitoring
- High resolution monitoring
- Low maintenance system
- Variety of ranges: 150, 300, 500, 1500mm
- Resolution*: 0.025% full scale (minimum)
V-Notch Weir Plate
V-Notch Weir Plate specifications:
- Made from corrosion resistant materials
- Fixed or portable
- Simple principle
- Very low maintenance
Geomotion specialises in the automation of V-notch weirs, offering transducer and level radar flow meters. Contact us for a customised V-Notch Weir plate quote from 15 to 100 Litres/second.
Automated Water Level Radar
The Automated Water Level Radar is a level and flow monitoring product for V-Notch flow. Suitable for run-dry installations.
Some of the features of the Automated Water Level Radar are:
- Continuous Readings
- Ingress Protection: IP66/68
- Measuring Range: up to 8m
- Temperature: -40 to 60°C
- Accuracy: up to ± 5 mm
- 4G Modem
- 20W Solar Panel & Rechargeable battery combo
Operation
Discharge is a function of the geometry of the weir and the height of the water above the notch. The weir monitor reads the height of the water from which seepage or discharge rates can be calculated.
The system can be read remotely and automatically when used in conjunction with a data acquisition system. Manual reading can be done by reading the water level with a scale or a staff gauge, or by reading the monitor with a Vibrating Wire Readout.
Application
The Vibrating Wire V-Notch Weir system is typically used as a part of dam safety monitoring program. They can also be used to measure flow rates in open streams, channels or tanks.
Typical applications include:
- Longterm seepage monitoring of dams and tunnels
- Drainage systems in dams and tunnels
- Springs and artesian wells
- Stilling basin monitoring
- Environmental monitoring
Geomotion offer installation and monitoring services to support this system. For more information please email info@geomotion.com.au or contact any of our locations.
