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Of the various methods Openchannelflow has developed for conditioning flow for flumes, Tranquilizing Racks are the most common. Tranquilizing Racks are vertical "fingers" that extend down into the flow to break up poor velocity profiles and develop uniform, straight line flow…

For industries required to measure and / or sample their effluents prior to discharging to a municipal sewer system or surface water, finding sufficient area to install a primary device can be a struggle. In many instances, it is difficult to find a site that provides sufficient…

Bubbler style flow meters provide the most accurate measurement of level in open channel applications; more accurate than ultrasonic or even pressure transducer flow meters. Using an internal air compressor to push a measured volume of air through a vinyl or Teflon bubbler line,…

The 36-inch Parshall Flume is equally at home measuring water rights, sanitary flows, and surface waters. The 36-inch Parshall Flume is useful in a number of applications:

Pure and simple, Openchannelflow makes fiberglass Parshall flumes. We aren’t resellers, we aren’t distributors, and we don’t job shop production. What we are is manufacturer of premium quality, dimensionally accurate, and corrosion resistant fiberglass Parshall…

The typical bracket used to mount an ultrasonic sensor over a flume or weir is a contractor fabricated one-off assembly. These assemblies often mount the ultrasonic sensor too high, too close to the flume / weir sidewall, or aren't sufficiently rigid - making accurate flow…

As we have discussed before on this blog, the importance of conditioning and properly transitioning flows into a flume can’t be understated as it can have a dramatic effect on a site’s ability to provide accurate flow data. Openchannelflow offers a number solutions to…

Openchannelflow offers bolt-down covers as an option for flumes and weirs. The covers are suitable whether the flume or weir is above grade, below grade, or installed in a Packaged Metering Manhole.

Replacement flume floors (aka "magic bottoms") are designed to correct installation problems associated with setting a flume too low in relation to the channel surrounding channel. They are also useful in correcting installations that have experienced settling.

Nested flumes are traditionally Parshall, Montana, or Cutthroat styles, but Palmer Bowlus flumes can also be successfully nested. The ability to nest flumes inside each other can be use in a variety of applications, including:

Packaged Metering Manholes factory integrate a flow measurement flume / weir into a fiberglass manhole to provide a complete, turn-key solution to monitor industrial and municipal flows. Openchannelflow Packaged Metering Manholes come complete and ready for immediate…

Traditionally flumes are used to measure at or below grade flows. These flow are commonly natural channels (gullies, swales, creeks, streams, and rivers) or manmade channels (treatment plants or storm drains) / piping. For these applications the flume can either be cast in place…