Your email address will not be published. Price versus popularity of a flow meter. It is one kind of device used to measure the gas flow rate, steam otherwise liquid throughout a pipe. All Rights Reserved. All Obstruction Flowmeter. These meters are classified into four types which include the following. Thus, it is important to calibrate the flow meters from time to time. In this article, we will try to look at each category with brief details of particular devices that fall under that category. Flow meter is a device that measures the rate of flow or quantity of a moving fluid in an open or closed conduit. Flow measurement for liquids, gases and steam. The most common method used to measure flow rate or totalized flow is a volumetric meter to measure at line conditions and a densitometer or chromatograph to measure fluid density also at line conditions. In many cases, the flow of mass is the main consideration, particularly in gases selling/buying, chemical reactions, combustion, etc. Open-channel flow occurs when liquid flows in a conduit or channel with a free surface. In general, flow can be measured in two different ways like based on volumetric & weight. The flow of liquid is frequently measured in units of cubic feet/second, cubic meters/second, and gallons/minute. of accepted isolated volumes. This technology is named as L2F or Laser-Two-Focus and it uses two laser rays for detecting the light diffusion particles carried by the flowing liquid. Each of the flow measurement devices used had its own advantages and disadvantages. The working principle of flow meter is to measure the amount of gas, liquid otherwise streams around the device. Usually, high-end manufacturers who have expertise in this field, provide an accuracy of 95-99%. Radiation measuring devices Devices for measuring radioactive contamination are offered as cost-effective end-user devices that issue an alarm at specific threshold values and as a rugged dosimeter with a digital display for professional use. Coriolis mass type is the most accurate but it is expensive. These meters are used to measure open channels such as streams or rivers. Modern innovations in the measurement of flow rate incorporate electronic devices that can correct for varying pressure and temperature (i.e. While as many as seven different types of flowmeters can be used to measure steam flow, the vast majority of steam flow measurements are made with differential-pressure (DP) and vortex flowmeters. There is a lot of technical knowledge and expertise required in the development of these devices. Thousand years ago, people know the concept of flow meter and their measurement when farming, irrigation, and water conservancy became essential to humans. There are companies in the market who possess expertise in the manufacturing of flow measurement devices. The flow meter which is replacing the differential pressure meters in its applications is A. Vortex-shedding flow meter B. Electromagnetic flow meters C. Ultrasonic flow meters D. Flow Measurement Page 3 Rev 1.0 9/xx/06 Mitchell Cottrell device that has been in use for measu hese plates are generally installed by trapping it e plate, he calculation for incompressible (liquid) flow is The equivalent of the notch weir in a tube would be an orifice plate. There are many irregularities in the flow of any liquid which must be taken into consideration while designing a liquid or gas flow meter. The applications of flow meters mainly include in industries like pharmaceuticals, metallurgy, petrochemicals, home energy, pulp & building. With an increase in market trend in air and water treatment applications, the importance and use of these devices are increasing. Go to product finder; Go to Applicator What are The Applications of Flow Measurement Devices? A flow meter (or flow sensor) is an instrument used to measure linear, nonlinear, mass or volumetric flow rate of a liquid or a gas. ... Venturi Tube Due to simplicity and dependability, the Venturi tube flowmeter is often used in applications where it's necessary with higher Turn down rates, ... Flow measurement part III Burdwan University. The Venturimeter: A Venturimeter is a device meant for measuring the quantity of a liquid flowing through a pipe.