However, this cannot happen if you are using the wrong type of flow meter or incorrectly installing your instrument. Therefore, it is just as important to determine if your application requires a mass flow meter or a volumetric flow meter.
Each type has its own set of benefits and can be used across many industries and for various applications. In mass flow meters, the flow rate is calculated by measuring the amount of mass of a substance passing through a device for a given amount of time.
In volumetric flow meters, the flow rate is calculated by measuring the volume of a substance through a device over a given period. It is also important to keep in mind that there are various types of substances that can pass through a flow meter such as liquids and gases. Another key difference when it comes to mass and volumetric flow meters are the various types of instruments available for each flow meter and are selected depending on the desired application.
In the following comparison, we will primarily focus on the principles of operation for thermal mass flow meters and turbine flow meters for volumetric flow. Thermal mass flow meters operate by utilizing thermal sensing technology. As flow enters the device, a small portion is redirected into a small tube containing two coils — one downstream from the other.
The first coil introduces a small amount of heat into the gas stream. As the gas passes through the tube, the smart electronics sense the amount of heat transferred from one coil to the other. The output of the thermal mass flow sensor is directly related to the specific heat characteristic of the gas being measured. Coriolis mass flow meters and controllers , however, do not use known gas properties to calculate flow rates. They are able to measure fluid densities themselves and accurately output true mass flow rates, even when flowing process fluids of unknown composition.
Discuss your process with an applications engineer Tags: Bioreactor fuel cell k factor laminar flow mass flow natural gas volumetric flow what is mass flow This site uses cookies to improve your browsing experience. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website.
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It is mandatory to procure user consent prior to running these cookies on your website. What is mass flow? Knowledge Base What is mass flow? What do mass flow meters and controllers do? Here we introduce the concepts of mass flow and volumetric flow and discuss use cases for each measurement. Volumetric flow rate, also called the actual flow rate, is a measure of the volume of fluid that flows through the instrument per unit time.
In the gas mass flow industry, mass flow rates are an expression of volumetric flow rates corrected to standard conditions. It really depends on the goal of your application. Many applications benefit from mass flow instruments, as they can precisely measure and control the flow of gas molecules into or out of a process. At any selected mass flow rate, the number of molecules flowing through the point of measurement is constant regardless of temperature or pressure conditions.
Mass flow rates could also be considered molar flow rates. Volumetric flow instruments are generally less expensive than mass flow devices, and can be a great option if you need to measure or control a specific actual flow of gas without regard to the density of the process gas. Industrial hygiene and environmental air monitoring are two applications that utilize volumetric flow. The goal in each is to quantify the number of particles within a specific volume of air under the ambient conditions.
Alicat laminar DP gas flow meters and controllers provide readings for both mass flow and volumetric flow rates. This allows users to choose whichever measurement makes the most sense for their application and compare the two, or switch between closed loop control on mass flow rate and volumetric flow rate. Alicat also has Coriolis meters and controllers for true mass flow rates and liquid flow devices. The primary difference between mass flow and volumetric flow devices is their use of temperature and pressure sensors.
Discuss your process with an applications engineer Tags: air monitoring gas mixing industrial hygiene mass flow volumetric flow This site uses cookies to improve your browsing experience. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website.
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