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We need reliable open channel flow meters for storm water. Static level in the pipes may vary from empty to completely full because of level variation in receieving waters.
The storm water is fairly clean. Pipes are from 3 feet to 7 feet in diameter. There is some silt and occasional vegetation. We have tried Marsh McBirney Model 253 (Faraday velocity sensor with pressure cell level sensor) to make velocity times area flow measurement. There is frequent, nearly daily, loss of conductivity message from the meters. Is there anything other than a flume or weir that works better?
The storm water is fairly clean. Pipes are from 3 feet to 7 feet in diameter. There is some silt and occasional vegetation. We have tried Marsh McBirney Model 253 (Faraday velocity sensor with pressure cell level sensor) to make velocity times area flow measurement. There is frequent, nearly daily, loss of conductivity message from the meters. Is there anything other than a flume or weir that works better?