Open channel: a flow of fluid where there is one free surface present, and the only pressure on it comes from gravity. Read More…
Leading Manufacturers
Sierra Instruments
Monterey, CA | 831-373-0200Sierra manufacturers high performance mass flow meters and controllers for nearly any gas, liquid or steam. Customers choose Sierra when they need an accurate and repeatable flow measurement, short delivery lead times, and expert flow advice.
HydraCheck
West Valley City, UT | 800-316-5342HydraCheck offers everything needed to service, maintain and troubleshoot hydraulic systems at prices you can afford. We manufacture and distribute diagnostic test kits, flow meters, pressure gauges, tachometers, etc.
Aalborg Instruments & Controls, Inc.
Orangeburg, NY | 800-866-3837Aalborg Instruments & Controls is a globally recognized manufacturer of precision instrumentation for flow measurement and control. We offer variable area flow meters, thermal mass flow controllers, and more. Since our founding in 1972, it has been our commitment to develop, produce and deliver the highest quality products and services, as well as consistently meet or exceed customer requirements. We are ISO 9001:2015 certified.
RCM Industries, Inc.
Concord, CA | 925-687-8363Since our founding in 1972, RCM Industries has served industries ranging from pharmaceutical to chemical to food and beverage. Our flow meters are designed to improve productivity, reduce cost, and protect the most sensitive equipment and processes. All flow meters are suitable for measuring water, oil, and most low viscosity liquids, and are available in Monel, stainless steel, and bronze alloys. No matter what your application, we aim to exceed your expectations.
SeaMetrics, Inc.
Kent, WA | 800-975-8153SeaMetrics, a flow meter manufacturer, produces turbine flow meters, paddle wheel flowmeters, insertion flow meters, low-flow meters, water flowmeters, pulse flowmeters, flow sensors and electronic controls.
Spirax Sarco, Inc.
Blythewood, SC | 803-714-2000Spirax Sarco is an established manufacturer of a variety of flowmeter products for liquid, gas and steam applications for a wide range of markets. Spirax Sarco is able to provide its customers with a family of products capable of measuring and controlling most liquids and gases.
There are many different types of open channel flow, depending on the environment in which they are found. For example, some have no changes in the depth of liquid where others have a constant, unsteady flow.
Open channel flow meters monitor the relationship between the depth of the liquid and the flow rate. In contrast, most other flowmeters use mass or volumetric data to determine flow rate. In order to do their work, open channel flow meters typically use ultrasonic transducers, pressure sensors, shaft encoders, or special radars that can function in a free surface.
Other types of open channel flow measurement include: area/velocity flow measurement, level to flow measurement (measured at a designated point behind a weir, in a flume, or other hydraulic pumps, using various secondary devices), dye testing (when operators add a known amount of dye (or salt) per unit time to a flow stream. After complete mixing, they measure the concentration; the dilution rate equals the flow rates.), and Acoustic Doppler velocimetry (used to record instantaneous velocity components at a single point with a relatively high frequency, uses the Doppler shift effect to measure the velocity of particles in a remote sampling volume).
Open channel flow meters work where traditional flow meters cannot. Specifically, traditional flow meters cannot work where the top surface of a liquid is exposed to the open air. Most commonly, open channel flow meters are used in water and wastewater industries, as water and wastewater are by and large the most common liquids found in open channel flows. However, they are also popular anywhere open channel flows are found. They can even measure flow in rivers.
Regardless of your exact application, if you seek an open channel flow meter, you need to find a supplier that is knowledgeable on the subject, skilled, and reliable. Find that supplier by browsing the websites of those flow meter manufacturers and distributors that we have listed on our website, and reaching out to one or more of them with your specifications.