MONITARIO Technical Services INC. fabricates all flumes from 316 stainless steel. This material has been found to stand up to corrosion, heat, and ice. Fasteners for installation are all made from 316 stainless.

Innovation in practice

    The installation above uses a trapezoidal flume, which is good for low, and medium flow rates, but can also accommodate high flow rates experienced less frequently.

    The trapezoidal flume is good for, self cleaning, and passing ice floats.

    This installation also has a complete flow metering secondary device, which runs off of battery/solar. The client desired ease of operation, so this system was designed for flow rates, and total flow to be available, and on display all the time. The system was installed in 1995.

    Flumes come in many different sizes and shapes of control sections for many reasons. Some of which include:

Low, medium, and high end accuracy requirements.

Approach conditions to the measurement point.

Allowable head elevation, and anticipated maximum flow rate.

Ability to transport solid material and debris.

Seasonal conditions, and effects on the physical conditions of the flume.

Practical limitations dictated by the physical restraints of the site.

Accuracy in flow measurement must be kept as the primary objective.


MONITARIO retrofits existing channels, sewers, and ditches to best accommodate the application to measure flow. All conditions must be met to be sure flow rates are going to be delivered with accuracy; few compromises are allowed.

All flumes are cost effective when compared with other flow metering methods. Particulars for your application can be faxed to our office and quoted on, within weeks. Shipment can be arranged for any destination in North America.

    Some flumes can deliver greater accuracy, however are not suitable for all installations when retrofitting is required. A new installation or a channel designed to measure flow rates can have such a high accurate flume built in. These flumes are usually the Parshal design which have been thoroughly tested and evaluated.


    The critical depth flumes or those with an elevated throat section are the typical ones used to retrofit a rectangular or circular sewer, however these flumes may not have the low end accuracy or head to flow linearization necessary for the accuracy and range required.


    Weirs for channel flow application and for tank overflows can increase the flow through a channel or an overflow window by increasing the coefficient of discharge or constant of the device. Round nosed, broad crested flumes are usually more accurate throughout the overall range than the typical sharp crested weir. Broad crested flumes are also easier to maintain and will not foul as easily.