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Generally when we look at applying a Flume to measure flow we are more concerned that the flow is not too energetic. Sometimes, however, the flows can be too slow and too solids laden.

It isn’t always desirable or practical to measure industrial effluent flows below grade. For those applications, Openchannelflow takes our proven Redstone fiberglass enclosures and nests a flow-measuring flume or mag meter. Lockable, rugged, and secure, Redstone enclosures…

To give our shelter / building and enclosure products superior strength and dimensional stability, Openchannelflow has developed proprietary X-Web technology.

Whether you call them buildings, shelters, or enclosures, pre-engineered structures from Openchannelflow offer superior walk-in protection of equipment and process machinery for even the harshest of conditions. Fiberglass buildings used in a wide range of applications, including:

While many automatic wastewater samplers on the market today tout NEMA 4X housings, the need to house and protect them has not gone away. Whether the need is to protect the sampler from vandalism or the corrosive effects of a treatment plant environment, Fiberglass Sampler…

Weirs, like flumes, work by accelerating slow, sub-critical flow (Fr1). The acceleration develops a know relationship between level and flow upstream of the weir itself. But what happens when the flow approaching the weir isn’t sub-critical, but instead is critical or…

Parshall Flume Flow Monitoring Manholes from Openchannelflow take the tried and true Parshall flume and factory integrate it into a fiberglass manhole. The resultant structure is perfect for monitoring industrial discharges, municipal sewers, and dam seepage on below grade…

When installed in manholes or potential pedestrian traffic areas, flow monitoring flumes can be a hazard. A typical flume installation is an open trough that that an operator can inadvertently step or fall into.

Like many flumes, the Cutthroat flume was originally conceived to measure agricultural / irrigation flows. Over time, however, the Cutthroat flume has been adapted to measure open channel pipe flows. Specially shaped transitions (end adapters) allow the Cutthroat flume to connect…

Measuring open channel (non-full pipe) flows in round pipes can be difficult when measurement costs need to be low or where power is not available at the site. There are proprietary weir inserts available, but they can be inconveniently sizes or insensitive or unrated for the…

A watershed is an area of land that feeds all surface and ground water into a single body of water (stream, river, lake, etc.). Watersheds can combine to form progressively large watershed networks that drain into progressively larger bodies of water. Watersheds are typically…

For installations where a Packaged Metering Manhole will be located away from vehicle and pedestrian traffic, Openchannelflow offers domed fiberglass tops. These tops are lightweight, structurally strong, and provide excellent operator access.

One of the questions that we get asked again and again is: where do you measure the flow in a Parshall flume? But which is right? Are they all right? Are none of them right?

One of the requirements of accurate flow measurement with a Parshall flume is a tranquil flow approaching the flume. Poorly balanced, surging, or turbulent flows will adversly affect the systems accuracy for both instantaneous and totalized flow. Here we have an example of highly…

Openchannelflow offers to different methods of mounting doors on our Fiberglass Equipment Shelters: strap hinges and piano hinges.

In tight equipment shelter installations every square foot can count. But tight spaces can also mean increased ventilation needs. To increase ventilation and to free up valuable wall space, Openchannelflow offers factory integrated door vents for our line of Fiberglass Equipment…

Fiberglass Shelters from Openchanneflow provide a pre-engineered, corrosion-resistant, and structurally sound way to protect vital equipment. With almost limitless possibilities when it comes to door / access hatch integration, operators can access the shelter interior where they…

Many times Flumes have to be installed in applications where the flow cannot be properly conditioned before it enters the flume. For those applications, Openchannelflow offers Energy Absorbers and Tranquilizing Racks to helps dampen and condition the flow entering the flume.

Insulated flume covers from Openchannelflow can help to provide better flow data during cold weather periods by eliminating frost / ice build up on the flow meter sensor as well as insulate the space above the flume. When used in conjunction with a strip, pipe, or immersion…

When Dr. Parshall published his studies on what would come to be known as the Parshall flume he originally did so in The Colorado Agricultural College publication: The Improved Venturi Flume.