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A volumetric flowmeter measures fluid flow by placing an obstruction in the flow path that displaces a known amount of fluid. It can accurately measure a wide range of fluids, but is sensitive to dirty or corrosive fluids. It is widely used in commercial and domestic applications.
A volumetric flowmeter is an instrument that measures the flow rate of a fluid by allowing it to move through the meter in known, balanced increments. This action is accomplished by placing a rotating, swinging, or nutating obstruction in the fluid flow path that displaces or displaces an exact amount of fluid each cycle. By reading the number of cycles that the fluid flow imparts to the mechanism, it is possible to calculate the exact values of the flow volume. Volumetric flowmeters come in several designs with reciprocating piston, diaphragm, and oval gear types being common examples. These meters offer several advantages over other types and are widely used as metering devices for consumption points such as domestic residences and businesses.
Flowmeters are used to measure real-time or totalized volumetric flows for liquids and gases. There are different types of flow meters, each of which has its own advantages and specific areas of use. The volumetric flowmeter is a type of mechanical flowmeter that is best suited for clean, non-corrosive fluids. Within these parameters, this meter is capable of accurately measuring a wide selection of fluids, including those with high viscosities.
The volumetric flowmeter works by passing the fluid over a mechanism made up of several cells or divisions of equal volume. The passing fluid spins or motivates this mechanism, thereby causing the fluid to pass through the meter body in a series of equal portions. The rotating mechanism operates a counter which reads the number of revolutions made and, given the known nature of each portion passed, calculates the exact volume passed at any given moment. The cells or divisions that make up the gauge mechanism are formed from impeller blades, paddle cups, diaphragm chambers, and lobed or oval gears.
This meter variant has several advantages which include high accuracy and the ability to accurately measure low flow rates. The meters also have a high turndown rate which is the total effective range of flow measurements they are capable of delivering. The volumetric flowmeter also requires little flow conditioning of the pre-dosing fluid, thus allowing it to be placed directly after bends or joints in system piping. The only real drawback to this type of meter is its sensitivity to dirty or corrosive fluids. Their accuracy and flexibility make the volumetric flowmeter a popular choice for consumer measurement in both commercial and domestic applications.
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