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Flume water meter4/5/2024 ![]() under free-flow conditions, the depth of water at a specified location upstream of the flume throat can be converted to a rate of flow. ![]() The Parshall flume accelerates the flow through a contraction of both the parallel sidewalls and a drop in the floor at the flume throat. ![]() Soil Conservation Service, the Parshall flume is a fixed hydraulic structure used in measuring volumetric flow rate in surface water, wastewater treatment plants, and industrial discharge applications. The Parshall flume is a modified version of the Venturi flume. Parshall flumes (right) alongside other types of flow meters Diagram of a Parshall flume, showing free-flow and submerged flow operating regimes The secondary point of measurement (Hb) for a Parshall flume is located in the throat, measuring Hb can be difficult as flow in the throat of the flume is turbulent and prone to fluctuations in the water level in which 90% is viewed as the upper limit for which corrections for submerged flow are practical. Submergence transitions for Parshall flumes range from 50% (1–3 inch sizes) to 80% (10–50 foot sizes), beyond which point level measurements must be taken at both the primary and secondary points of measurement and a submergence correction must be applied to the flow equations. The flumes are not patented and the discharge tables are not copyright protected.Ī total of twenty-two standard sizes of Parshall flumes have been developed, covering flow ranges from 0.005–3,280 cfs (0.1416–92,890 L/s). The Wi-Fi bridge is about 50 feet from the meter and works fine. It simply straps to the meter and 'listens' to the Neptune meter mechanism. Flumes smart water meter is easy to install - easier if your water box is relatively tidy. The design of the Parshall flume is standardized under ASTM D1941, ISO 9826:1992, and JIS B7553-1993. With smart meters for gas and electric already in use, it seemed ridiculous to not have that level of detail for water. Some states specify the use of Parshall flumes, by law, for certain situations (commonly water rights). Measuring liquid flow in channels is a unique challenge requiring specialized technology and Siemens delivers. Under free-flow conditions, the depth of water at a specified location upstream of the flume throat can be converted to a rate of flow. SITRANS L transmitters and controllers provide reliable solutions for continuous monitoring of wet wells, flumes, and weirs. The Parshall flume accelerates flow through a contraction of both the parallel sidewalls and a drop in the floor at the flume throat. Access to detailed, down-to-the-minute water use datato the one-hundredth of a gallon. It is used to measure volumetric flow rate in industrial discharges, municipal sewer lines, and influent/effluent flows in wastewater treatment plants. The Parshall flume is a fixed hydraulic structure. The Parshall flume is an open channel flow-metering device that was developed to measure the flow of surface water and irrigation flow. ( Learn how and when to remove this template message) ( February 2022) ( Learn how and when to remove this template message) See Wikipedia's guide to writing better articles for suggestions. This article's tone or style may not reflect the encyclopedic tone used on Wikipedia.
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