File Name: flow meter types and their principles .zip
Click here to view Vol. In case you haven't noticed, there are several types of flow meters and flow sensors. There are also a number of different operating principles.
Flow Meter requirements vary, from mass flow to volume flow and beyond. From Coriolis flow meters , to magnetic flow meters , we offer a comprehensive, industry-leading portfolio of flow measurement devices. Coriolis meters are generally considered the most repeatably accurate flow meters available today. Coriolis meters are ideal for any application where high accuracy is a key factor for consistent product quality, safety and revenue.
They are often applied in custody transfer applications due to their excellent accuracy over broad conditions and low maintenance requirements. Differential Pressure is the oldest industrial measurement technology still in use today, with a proven documented history of performance. The differential pressure flow meter is the most widely used flow technology in industrial process measurement and control, natural gas custody transfer measurement and many other applications.
Electromagnetic flow meters known more simply as magnetic flow meters, or mag meters , represent the second largest segment within the precision flow meter market, and will likely overtake the top position held by traditional Differential Pressure DP flow technologies.
Magnetic flow meters are a top choice for measuring the volumetric flow of conductive liquids due to their excellent measurement performance across a wide range of process conditions. Applications include: direct wellhead monitoring, multi-well testing, allocation and fiscal metering, as well as shale well flow back monitoring. Turbine meters are an easy way to accurately measure liquid flow rates in clean, ideally self-lubricating fluids. Turbine meters are used for custody transfer applications in many applications in the petroleum and chemical industries.
A turbine meter measures volumetric flow, but unlike a vortex meter, it can measure low flow rates and higher viscosity liquids with very high resolution and accuracy. Ultrasonic meters are commonly used for custody transfer and fiscal oil and gas measurement.
However, process conditions such as composition, pressure and temperature dictate which type of ultrasonic meter is most appropriate. Our reliability services are key to avoiding unplanned shutdowns, increasing yield and reducing costs.
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An ultrasonic flow meter is a type of flow meter that measures the velocity of a fluid with ultrasound to calculate volume flow. Using ultrasonic transducers , the flow meter can measure the average velocity along the path of an emitted beam of ultrasound, by averaging the difference in measured transit time between the pulses of ultrasound propagating into and against the direction of the flow or by measuring the frequency shift from the Doppler effect. Ultrasonic flow meters are affected by the acoustic properties of the fluid and can be impacted by temperature, density, viscosity and suspended particulates depending on the exact flow meter. They vary greatly in purchase price but are often inexpensive to use and maintain because they do not use moving parts , unlike mechanical flow meters. There are three different types of ultrasonic flow meters. Transmission or contrapropagating transit-time flow meters can be distinguished into in-line intrusive, wetted and clamp-on non-intrusive varieties.
Due to its reliance on the ability of the fluid or gas to displace the float, graduations on a given rotameter will only be accurate for a given substance at a given temperature. For all industrial process applications. These types of flow meters often measure a positive volume when dealing with small quantiles, or the volume can be totalized over time when measuring large quantiles. The float moves up and down according to the flow, and the reading taken when it balances indicates the flow rate.
March One of the most important measurements in the chemical process industries CPI is rate of flow. Flowrates can be important to measure, and in fact can be critical to measure, throughout a process — from dosing components into a reactor to material transfers in-between process steps, to discharging products at the end. Flow metering technologies fall into four classifications: velocity, inferential, positive displacement and mass. This article summarizes the considerations in selecting and applying these different types of flowmeters, and provides examples of flowmeters in each category. Multiplying the measured average velocity by the cross-sectional area of the meter or pipe results in volumetric flowrates.
A flow meter is used in different types of applications to measure the volumetric flowrate or mass flowrate. The specific application defines the type and capacity of the flow meter. Fluids, gases and liquids, are measured in terms of volumetric flowrate and mass flowrate. There are numerous types of flow meters depending upon the application, the specific fluid and the construction, including materials, of the flow meter. The 5 basic classification of flow meters include:. Differential pressure flow meters measure the differential pressure across an orifice where flow is directly related to the square root of the differential pressure produced.
Flow Meter requirements vary, from mass flow to volume flow and beyond. From Coriolis flow meters , to magnetic flow meters , we offer a comprehensive, industry-leading portfolio of flow measurement devices. Coriolis meters are generally considered the most repeatably accurate flow meters available today. Coriolis meters are ideal for any application where high accuracy is a key factor for consistent product quality, safety and revenue. They are often applied in custody transfer applications due to their excellent accuracy over broad conditions and low maintenance requirements.
This article explains a thermal mass flow meter and clarifies the working principle of thermal flow measurement. A thermal mass flow meter is a precision instrument that measures gas mass flow. The device is used in a wide range of applications in many industries. How can we help you? The Sage flow meters are available in either inline flow bodies or insertion-style. These sensors are resistance temperature detectors RTDs or resistance thermometers and measure temperature. One of the RTDs is heated by an integrated circuit and functions as the flow sensor , while a second RTD acts as the reference sensor and determines the gas temperature.
Когда-нибудь он станет мировым стандартом. Сьюзан глубоко вздохнула. - Да поможет нам Бог, - прошептала. - Мы можем принять участие в аукционе. Стратмор покачал головой: - Танкадо дал нам шанс.
В голове у него не было ни единой мысли - полная пустота. Он не знал ни где он находится, ни кто его преследует и мчался, подгоняемый инстинктом самосохранения. Он не чувствовал никакой боли - один лишь страх. Пуля ударила в кафельную плитку азульехо чуть сзади. Осколки посыпались вниз и попали ему в шею.
Стратмор улыбнулся, не разжимая губ. - Вы читаете мои мысли, мисс Флетчер. Сьюзан Флетчер словно была рождена для тайных поисков в Интернете. Год назад высокопоставленный сотрудник аппарата Белого дома начал получать электронные письма с угрозами, отправляемые с некоего анонимного адреса.
Какие-нибудь новости, Сьюзан? - спросил Стратмор и тут же замолчал, увидав Грега Хейла. - Добрый вечер, мистер Хейл.
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