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Key Outcomes 

  • Much higher accuracy and repeatability achieved with non-intrusive clamp-on technology compared to the previously installed open channel meter
  • 3 to 4 times more cost effective than in line flow meter options
  • Maintenance-free with no moving parts or water contact
  • Better measurement performance than the other clamp-on flow meters tested by the customer
  • Ability to offer 80 m sensor cable without need of a junction box
  • Great local service and support through Flowservices (FLEXIM distributor)

Business Problem 


The only double delta river in the southern hemisphere, the Manning River is the lifeblood of the Manning Water Supply Scheme. From the river water is piped to Bootawa Dam where it is stored before being transferred into the water treatment plant for processing. Bootawa Dam has the capacity to hold 2,275 million litres of water and covers a 26.3 hectare storage area.

The Bootawa Water Treatment Plant delivers a world class standard of water to the community it serves. The membrane filtration plant is capable of processing up to 60 million litres of water per day, with a provision for further upgrading to 75 megalitres when required. The plant is fully automatic and monitored by advanced SCADA technology.
MidCoast Water wanted to improve the flow monitoring of water that was pumped from their Bootawa dam to the Bootawa Water Treatment Plant. Previously, MidCoast Water had been using an open channel meter located at a flume within the water treatment plant to monitor the flow. But the accuracy of the system was unsatisfactory, especially at times of low flows. Therefore they began looking for alternative technologies with which to achieve a more reliable and accurate measurement of water entering the treatment plant.
Initially, MidCoast Water considered installing a magmeter on the 1221 mm mild steel transport line leading from the reservoir to the treatment plant. But a magmeter of the required size would have been expensive and the installation process very labor-intensive. Instead, a more elegant and cost-efficient method was identified in the form of clamp-on ultrasound flow measurement.

The Flowservices Solution 

MidCoast Water trailed clamp-on flow meters from several suppliers, but only Flowservices could satisfy their demands with regards to performance of the meter, and especially stability of the measurements. A further factor that influenced MidCoast Water’s purchase decision was the excellent support given by Flowservices.

The Flowservices solution provided a cost-effective and highly accurate flow monitoring system. The media was water flowing through a drinking water trunk main that is 1221 mm (48’’) (outer diameter) and mild steel (12 mm) with concrete lining (18 mm). The instruments used is a fixed ultrasound flow meter model FLUXUS® F704 with CDK transducers using an 80m sensor cable.

Contact Flowservices to discuss your next flow measurement challenge.



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