Principle of Thermal Mass Flow Meter | Working Principle of Thermal Gas Mass Flow Meter

『Principle of Thermal Mass Flow Meter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)

What is the working principle of a mass flow meter? Mass flow meters are mainly divided into three types: thermal flow meters, differential pressure flow meters, and Coriolis flow meters, each of which works according to different original rock mechanics. Thermal mass flow meters utilize the principle of Kings law. By heating the gas inside the pipeline and measuring the change in heat, the mass flow rate of the gas is calculated. In specific implementation, the sensor includes two parts: speed and temperature. By calculating the relationship between temperature difference and gas mass flow rate, gas flow rate data can be obtained. Thermal flow meters are divided into two methods: constant temperature difference and constant power measurement. Among them, the constant power measurement method calculates by measuring the temperature difference before and after the gas passes through the pipeline while keeping the heating power constant. The differential pressure mass flowmeter is based on the Poissons law, which measures the virtual pressure difference between the slag before and after the gas passes through the pipeline, converts it into gas volume flow rate, and then converts it into mass flow rate. Differential pressure flowmeter has requirements for gas flow state, that is, the gas must be in laminar flow state. It calculates the gas flow rate by measuring the pressure difference at both ends of the laminar flow sheet. Compared to thermal flow meters, differential pressure flow meters have higher accuracy and patented technology. Coriolis mass flowmeter utilizes the principle of Coriolis force. By causing the bending part of the U-shaped tube to vibrate, the straight tube part is driven to vibrate. When gas flows through, the pipeline is forced to vibrate, and the gas or liquid generates a reactive force, known as Coriolis force, causing the pipeline vibration to be asynchronous. This difference is detected by the circuit and is proportional to the gas mass flow rate. The Coriolis flowmeter directly measures the mass flow rate of gas with high measurement accuracy. Overall, mass flow meters are suitable for different scenarios based on different principles, including thermal, differential pressure, and Coriolis flow meters, each with their own characteristics and advantages. Choosing the appropriate type of flow meter is crucial.

2. Yidu Library | Comparison of performance and application of laminar flow principle and thermal principle gas mass flow meters/controllers Comparison of performance and application between laminar flow principle and thermal principle gas mass flowmeter/controller (1) Gas microflow measurement and control is one of the important core technologies in high-end manufacturing industry, and its core sensors and control components are gas mass flowmeter and gas mass flow controller. These devices are mainly used for accurate measurement and control of small and micro flow (from 0.000001m ³/hour to 300m ³/hour, corresponding to pipe diameters ranging from 3mm to 65mm) gases. They require small volume, meticulous measurement and control, and can withstand the influence of environmental temperature and pressure as well as different gas working media. At present, there are two main principles of gas mass flow meters and controllers that meet these requirements: laminar flow principle and thermal principle.

First, laminar flow principle gas mass flowmeter/controller. The working principle of laminar

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