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The difference between mass flow meter and volume flow meter - focus on microfluidic control technology

Mass flow meter can directly measure mass flow, density dynamic detection, no compensation, and can directly measure volume flow. Volume flow meter can only measure volume flow directly. If mass flow is to be measured, give a fixed value during configuration. Density value, so you can not dynamically detect the density, the accuracy is a little worse. The mass flow meter is expensive, the measurement is more accurate, the volume flow meter is cheaper, but the two can be converted. If the unit has no money, try to choose the volume flow. The software is converted into mass flow representation, and the mass flow meter can measure the gas without being affected by temperature and pressure. The mass flowmeter detects the density value in real time, so it has nothing to do with the temperature of the material temperature.
According to the principle of conservation of materials, the general process prefers to use mass flow to judge. Therefore, if the measurement points to be evaluated require temperature and pressure compensation, the liquid can be properly used. Therefore, the use of mass flow meters is the best for instrumentation, but the price cannot be accepted. Moreover, the requirements for installation are also relatively high quality flowmeters using the principle of thermal diffusion. Thermal diffusion technology is a technology with excellent performance and high reliability under severe conditions. When a thermal mass flow meter has two temperature sensors placed in a medium, one of the sensors is heated to a temperature above ambient temperature and the other is used to sense the temperature of the medium. As the flow rate of the medium increases, the heat taken away by the medium increases, and the temperature difference between the two temperature sensors changes with the flow rate of the medium. According to the proportional relationship between the temperature difference and the flow rate of the medium, the flow rate Q of the fluid can be obtained. Most of the thermal mass flow meters are currently used to measure gases, and only a small number of thermal mass meters are used to measure small liquid flows.

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