Components Of Liquid Flow Measurement Devices

Flow measuring device 2.

Components of liquid flow measurement devices.

Only recently was approved a draft standard to its use in the industry in 2007 extended to 2010 and still has increasing popularity for future companies. The primary devices used in open channel flow measurements are weirs and flumes. A pitot tube is a simple device meant for measuring the velocity of a liquid at any point. Since the cross sectional area of the pipe remains constant and is known the typical velocity indicates flow rate.

A combination of one or more devices may also be used as part of a flow measurement process. Both gas and liquid flow can be measured in physical quantities of kind volumetric or mass flow rates with units such as liters per second or kilograms per second respectively. In general we can split the fluids into two classes. This flow meter is very practical capable of being used as a liquid flow measuring device as well as with liquids and steam flows.

It is a multidisciplinary field that involves engineering physics chemistry biochemistry nanotechnology and biotechnology. These measurements are related by the material s density the density of a liquid is almost independent of conditions. There are many types of liquid flow measurement devices. This measurement is then converted to flow using calculations developed specifically for the channel in which the device is installed.

Liquid flow measurement devices rely on the velocity of the liquid being measured. The velocity is the pressure differential which forces the liquid down the conduit or pipe. 1 1 types of flow measurement devices fluid flow devices fall into a number of device categories as well as fluid classes. Many techniques are used to ensure the liquid flow rate measuring device is performing correctly.

Devices for open channel flow measurement. Pessurer transducers these are capable of measuring the height of water as pressure increases with water depth. The device is placed in a moving liquid with the lower opening directed in the upstream direction. Kinds and units of measurement.

In its simple form the pitot tube consists of a glass tube whose lower end is bent at right angles fig. The devices used to measure the mass or volumetric flow rate of a liquid or gas include mechanical flow meters differential pressure based meters variable area meters electromagnetic flow meters thermal mass flow meters and more. With the known landfill characteristics the flow is usually determined by the height of the liquid in. Microfluidics refers to the behaviour precise control and manipulation of fluids that are geometrically constrained to a small scale typically sub millimeter at which capillary penetration governs mass transport.

Calibration in field proving and verification. Depending on the requirements of the flow meter and the environment where it is being used testing of liquid flow rate measuring devices can occur via three routes.