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The Department of Civil Engineering and Geomatics' Hydraulics Laboratory at Universidad Nacional Autónoma de México has an interesting video posted showing the hydraulic profile of a Parshall flume under both free and submerged flow conditions.

More common on Parshall flumes, end adapters are also available on Cutthroat flumes from Openchannelflow.

While the Parshall flume addresses many water measurement applications well, there are times when it just isn’t quite for the application. At those times a modification of the Parshall may be a better fit. Usually these modifications are driven by cost, portability,…

In its simplest form a Packaged Metering Manhole (PMM) consists of a primary device (typically a flume or weir) molded into a fiberglass (FRP) manhole. By directly factory integrating the primary device, a single-piece, drop in-place flow monitoring solution is created.

Traditionally end adapters for flume are specially shaped transitions attached to the inlet or outlet of a flume for inline connection with piping. But did you know that end adapters can also be used to transition and condition flows in open channels? Well, they can when they are…

Openchannelflow is pleased to announce the release of our new line of Redstone Series Fiberglass Enclosures to house monitoring equipment and provided secure storage of chemicals and equipment. Redstone Series enclosures are designed to be aesthetically pleasing and blend into…

One of the key elements in using a flume for accurate flow measurement is ensuring that sub-critical flow is present.

Mill Creek Regional - Effluent Tunnel - 120-Inch Parshall Flume

One of the problems contractors often face when installing a flume in a concrete manhole is forming the transitions into / out of the flume. Done poorly and the result is a flume that either experiences turbulence or submergence – both which will seriously compromise the…

Over the years several different styles of Palmer Bowlus flume have come into the marketplace, including the Insert style. While the original Palmer Bowlus flume was intended to be used in-line with piping, the Insert style is intended to nest into an existing pipe – not…

Can a new flume be installed in an existing Packaged Metering Manhole? Maybe. There are a number of factors to consider: manhole barrel diameter, manhole top style, existing flume style / size, and desired flume style / size.

Openchannelflow manufactures fiberglass Parshall flumes in sizes from 1 inch to 12 feet. Constructed of premium polyester resin, Openchannelflow’s Parshall flumes conform to ASTM D1941-91, ISO 9826:1992, JIS B7553, and the Bureau of Reclamation’s Water Measurement…