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The term “pressurized” refers to any conduit in which liquid flows through a pipe. Water is typically (but not always) pumped directly into a pipe in a closed and pressurized system.
Mechanical – Propeller, Positive Displacement, or Turbine
Electronic -
Electromagnetic (i.e. insertion or full pipe), Ultrasonic, or Vortex
For specifics for all the requirements for meters for pressurized systems, see:
The term “open channel” refers to any conduit in which liquid flows with a free surface, generally called canals or irrigation ditches.
Examples of Open Channel Measuring Devices:
Weirs - Sharp Crested (V-Notch,
Rectangular, or Cipoletti)
Flumes - Long-Throated or Parshall
Submerged Orifice
Electronic Methods - Doppler,
Electromagnetic, Anemometer and propeller velocity, Optical Strobe
For specifics for all the requirements for meters for pressurized systems, see::
The following link to a list of meter vendors and installers includes those who have received training on the Water Metering Program of the Washington State Department of Ecology. This training included the technical requirements for assessing a system and selecting a meter of the type and style for accurately measuring water.
Even though the majority of these vendors and installers are located in eastern Washington, they do provide services to water users in western Washington. They are, at least, good sources of information. You are not required to select one of the vendors or installers listed on this page.
* *The information contained in this web page regarding commercial products or firms may not be used for advertising or promotional purposes and is not to be construed as an endorsement of any product or firm by the Washington State Department of Ecology. This page is maintained to provide water users a list of meter vendors and installers that have attended technical training sessions that explained the water metering program of the Department of Ecology and the technical requirements for selecting a meter for pressurized water systems.
Copyright © Washington State Department of Ecology. See http://www.ecy.wa.gov/copyright.html.
