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Monitoring the flow of sewage is dirty and smelly, but that doesn’t mean it has to be hard! Many of the problems encountered in measuring surface and / or irrigation waters – high solids content, debris, the need to minimize head loss – are also present in sanitary…

One question that comes up again and again is: Can Parshall flumes have the flow spill off the end? The answer is yes! While initially designed for installation in irrigation channels and canals, the Parshall flume has been shown to be well suited for use on free-spilling…

When mounting an ultrasonic sensor over a flume or weir one thing that frequently gets overlooked is the blanking distance - aka deadband - of the sensor. The blanking distance is that distance from the face of the ultrasonic transducer in which the flow meter will blank out (or…

Flumes and weirs have historically been the tools used to measure the flow of water in natural and manmade channels. Either can be used by itself (with the operator taking manual level readings) or in conjunction with a secondary flow meter for automated data collection.

The primary purpose of a stilling well is to provide a area were level measurements can be taken free of wave action or water surges. The surges and wind waves present in the main body of flow can be dampened by restricting the opening area of the inlet port.

Since its introduction in the 1930’s, the Palmer Bowlus Flume has grown to be the second most common flume for measuring sanitary flows. There are, however, several distinct disadvantages in using Palmer Bowlus flumes. Unlike other styles of flumes that have strictly defined…

The Palmer Bowlus flume was designed for installation in existing manholes and in line with sewer piping / channels. These sorts of installations normally see nice average to upper range flows.

Like H flumes, on free-spilling discharges from pipe where more accuracy (+/- 3-5%) is needed that the California Pipe Method can supply (+/-10%), Montana flumes can be used to for accurate flow measurement.

On free-spilling discharges from pipe where more accuracy (+/- 3-5%) is needed that the California Pipe Method can supply (+/-10%), it is common to see H flumes used.

Automatic Samplers (also called autosamplers or simply samplers) collect and store water samples for laboratory analysis without the need for operator intervention. When used in conjunction with a flume or weir, automatic samplers can collect samples that are truly representative…

As winter approaches, the problem of how to continue accurate flow measurement raises its ugly head. The flumes most affected by cold weather are those that are measuring runoff flows. These are typically H Flumes mounted at or above grade and usually don’t see continuous…

The buildup of solids can wreak havoc on otherwise good flume applications if the style of flume isn’t well chosen.