I am trying to convince a local sewer authority to allow my client to utilize an electromagnetic flowmeter for partially full pipe specifically a Parti-Mag II for process wastewater (vegetable washwater).  The Authority uses magmeters but only on sewer mains that are constantly full.  Their engineer has no experience with electromagnetic flowmeter for partially full pipes, thus he wants us to utilize weirs or flumes.  Do you have any documentation or testimony that can be use to convince their engineer that electromagnetic flowmeter for partially full pipes is a viable metering device?

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Yes, but all manufacturers hype-up their products just ask any of them and they will tell you their product is the best on the market and it will do whatever you asked for...anyway everything I read on magmeters for partial flow shows accuracy of 3% to 5% of the actual flow rate, the processing plant's discharge is approximately .33 mgd.  Maybe the authority is worried they will lose revenue or they will miss out on a $10,000 fine if the factory discharges more than allowed. But I don't believe measuring through weirs or flumes are more actuate. The authority's operators are hands-on people and if there is literature or study's done on actual operating systems or even other operators' testimony of using these products would be beneficial.

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