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Re: Flow Monitors
Greetings,
I see many different issues being covered here in a single thread. Different velocity measurement technologies, different flow measurement applications, and different manufacturers.
Before buying any type of flow meter, get references from people using the same meter or technology in your same application. Stormwater is different from sewer, pipes are different from channels and streams, etc.
I've done sewer flow monitoring for quite a few years, and I have learned many lessons the hard way. For general sewer flow surveying, Isco's A-V meters are excellent. Sigma and Marsh-McBirney have decent meters depending on your application, but ADS's equipment is just awful, and expensive. Their flow measurement service claims are grossly exagerrated. If you need to accurately measure flows for billing, I recommend that you install a flume (preferably a Parshall if possible) with an ultrasonic level transmitter.
I'm relatively new to stormwater channel metering, but Isco/MGD's ADFM(accoustic Doppler flow meter) looks great, and several independent studies have been done that verify their accuracy claims.
Just be careful about choosing your solutions, and do your homework beforehand.
Chris Parrish
Atlanta, GA
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