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The purpose of a Parshall flume is to measure the flow of water in an open channel (or non-pressurized pipe). This water can be from a variety of sources, including: rivers, streams, canals, channels, field runoff, mine discharge, dam seepage, springs, wastewater, and industrial…

One of the most common uses for flumes is to measure the flow of sewage though collection systems. While we may tout the advantages of Packaged Metering Manholes - and they are considerable - the higher initial cost means that when an existing manhole is available, a flume is…

Parshall Flumes are a class of short throated flumes. Originally developed in the 1920's, the Parshall Flume has become the most researched style of flume leading to its wide acceptance and use in a variety of applications.

On the face of it, the H flume looks to be a good choice when selecting a device to measure storm water flows. At its core, a H flume is a hybrid device: a combination of a flume and a weir – melding the best of each into a single device. The flume has a wide turndown ratio…

Measuring storm water presents difficulties that other applications don’t usually experience.

In our blogs, we frequently highlight our abilities as a manufacturer of primary devices, including Parshall flumes, for the devices for the measurement, conditioning, and control of water in open channels. But what does it mean to be a manufacturer? What does it mean to be a…

While it is desirable for a flume to have free, unimpeded discharge, it can be difficult to guarantee this under all flow conditions. H Flumes have particularly low resistance to submergence, with submergence transitions of only 25-30%. The submergence transition of an H flume is…

While generally self-cleaning, flumes do require periodic maintenance and those measuring surface waters or in earthen channel installations usually requiring more than those in treatment plant settings. There are, however, no moving parts to wear out or replace.

H Flumes are a versatile and accurate way to measure open channel flows. They provide low end accuracy while at the same time providing large turn down ratios. They also pass granular solids well.

In edge-of-field / runoff monitoring sites it is not uncommon to have flow running in ill-defined channels (versus creeks or small streams). The problem then becomes how to capture and direct the flow into a flume or weir to quantify and measure the flow. Here wing walls are a…

Depending upon how the level-to-flow relationship is developed, flow measurement flumes can be divided into two types: short-throated (i.e. Parshall, Cutthroat, etc.) and long-throated (i.e. Palmer Bowlus, RBC, etc.). Flumes that are short-throated develop the flow relationship…

When we think of steel flumes - whether they be Parshall, Cutthroat, or H type – we are concerned with both the high (stainless) and low (galvanized) end of the market. While fabrication techniques are identical, the applications for steel flumes differ.