Blog

As Parshall Flumes get larger there are fewer applications that they fit beyond measuring surface waters and treatment plant flows. Even then, the 84-inch Parshall Flume is not frequently used - the flow rates for these applications are usually smaller or larger than the 84-inch…

Depending on what the constituents make up an industry's flow stream, a sewer system's owner (city / county) may require pre-treatment and metering before the industry is allowed to discharge to the sewer.  For many industries, plant downtime is a major concern when…

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…

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…

Of all of Openchannelflow's products, our Weir Boxes receive the most calls for customization; more so than our flumes, manholes, or even equipment shelters.  Some of the customization possible includes:   Materials of construction Flow capacity  Flow…

Industries measure their discharges either to meet their NPDES permit or because of municipal / county requirement. For industrial operators charged with monitoring their process discharges, a Packaged Metering Manhole can be a cost effective solution to their flow measurement…

Openchannelflow has designed a bubbler flow meter tube for flumes and weirs that is unique in the marketplace.  The tube is one continuous piece of thick walled tubing.  The top of the bubbler tube - where the traditional compression coupling is found - is swaged to…

Pure and simple, Openchannelflow makes fiberglass Parshall flumes.  We aren’t resellers, we aren’t distributors, and we don’t job shop production. Catalog companies and “design” resellers simply don’t have the close-coupled integration of…

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…