Mass flowmeter | Types and principles of flow meters

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What are the types of flow meters?

A flowmeter is a professional automated measuring instrument, whose main function is to measure the flow rate of a flow moderator. The measuring medium includes liquid, gas, steam, mixed slurry, solid dust, etc. It is precisely the special role of flow meters that in the field of industrial automation, flow meters and sensors are called the eyes of automation systems. The measurement results are transmitted to the upper computer system, and the system integrates and analyzes the data, and then applies the preset solutions to the upstream and downstream control systems to achieve intelligent automatic control. Common flow meters include: measuring cleaning liquids such as electromagnetic flow meters, ultrasonic flow meters, vortex flow meters, mass flow meters, orifice flow meters, turbine flow meters, metal rotor flow meters, etc. Measuring gases such as vortex flow meters, V-cone flow meters, orifice flow meters, balance backup flow meters, waist wheel flow meters (Roots), gas mass flow meters, etc. Measuring steam such as orifice flow meters, vortex flow meters, bend flow meters, etc. Measuring slurries such as electromagnetic flow meters. Users should choose the correct flow meter according to the requirements of the application scenario. Choosing the wrong flow meter will not only affect the project and production, but also cause unnecessary losses to the control system. If you are interested in measuring the flow rate of liquids, you can learn about TSD electromagnetic flow meters, which have high product accuracy and are suitable for various environments.

2. How is the mass of a mass flowmeter calculated? The mass flow meter directly or indirectly measures the mass flow rate of a fluid, and the specific calculation method depends on its working beam principle. The following are several main types of mass flow meters and their calculation methods for mass flow rate

1. * * Coriolis Mass Flowmeter * *: The Coriolis flow meter directly determines the mass flow rate by measuring the Coriolis force of the fluid inside the vibrating tube. When fluid flows through a U-shaped or spiral vibrating tube, it will cause distortion of the tube, and the degree of distortion is proportional to the mass flow rate flowing through it. By monitoring the vibration frequency and phase difference, the instrument can calculate the mass flow rate without the need for separate measurements of density, temperature, or pressure compensation.

2. * * Thermal Mass Flowmeter * *: A thermal mass flowmeter determines the mass flow rate by heating the fluid with a heating element and measuring the speed at which the fluid carries away heat due to its flow. The faster the flow rate, the more heat is carried away, resulting in a larger temperature difference between the two ends of the sensor. By combining the thermal properties of the fluid, such as thermal conductivity and specific heat capacity, the mass flow rate can be calculated. 3. Differential pressure mass flow meters (such as Delta P Flowmeters) indirectly calculate the mass flow rate by measuring the pressure difference generated before and after the fluid flows through the throttling device. When calculating, it is necessary to consider the density, flow velocity, and geometric dimensions of the throttling device. The specific calculation of hail cars usually follows the Bernoulli equation and related principles of fluid mechanics, and may

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