I work for the government ...

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I work for the government water and wastewater utility in our province here in Canada and we use 2 meters only.  Sensus meters on pipelines 5/8" to 1" (outside diameter) and magnetic meters (specifically Rosemount mag meters) for flows on pipelines exceeding 1" up to 36".  We have spent much time and resources researching the best meters for our customers and after years of testing we have decided that the mag meters are the only way to go for high flows and the Sensus meters for the small flows.

The accuracy of the mag meters that we use have a volumetric accuracy of ±0.25% with a turndown range of 13:1 to 40:1 with a ±0.5% accuracy.  These are very high quality meters.

The Sensus meters for the small flows (5/8" to 1") the accuracy is ±1.5% on normal flows and on low range flows the accuracy is ±3%.  Normal flows = 0.04  m3/hr to 12.5 m3/hr and low flows = 0.025 m3/hr to

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Dear Kurt, have you checked on a patented magnetic flow meter from KROHNE named Waterflux? You'd like to evaluate that as the turndown range is 400:1 is it is optimum even for low flows (typically during night). Kind regards, Claudio Costa

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