Does anyone know anything about mass flow meters?

What brand of mass flow meter is it? You don’t make it clear either. Although the principles are similar, they are not exactly the same

Mass flow meters have relatively high accuracy compared to other flow meters, especially those from Emerson.

A mass flow meter directly measures the mass flow rate of the medium passing through it; it can also measure the density of the medium and indirectly determine its temperature. Since the transmitter is an intelligent instrument based on a microcontroller, more than a dozen parameters can be derived from these three basic quantities for use by users. The mass flow meter features flexible configuration, powerful functions, and a high performance-to-price ratio, making it a next-generation flow meter.

The E+H mass flow meter is also good.

Mass flow meters can achieve a precision of 0.25. Currently, Rosemount E+h from abroad is quite good, and Dongfeng Electric in China also offers excellent products

In China, Qingdao also has companies that manufacture mass flow meters; if you need information, you can look it up online.

Let me address the issue of parameters specifically: First are the measurement parameters. Mass flow meters can directly measure mass flow, density, and temperature. Since mass flow is measured directly, the accuracy is relatively high, typically reaching 0.1% (verification accuracy). However, since the maximum accuracy specified in the national standard JJG1038 is 0.15%, manufacturers usually specify an accuracy level of 0.15%； The accuracy of density measurement is also quite good; Emerson’s devices can achieve 0.02% accuracy. When it comes to the density of water, domestic manufacturers generally do not pay much attention to this parameter ； A note on temperature measurement is needed: generally speaking, this parameter is of little use, as accurate readings can only be obtained when the temperature remains constant. The reason for this is that there is a measuring tube between the temperature probe and the medium. As a result, people usually pay little attention to this parameter. Manufacturers include it not for the sake of showing it to users, but mainly for various compensation purposes, particularly to compensate for measurement errors caused by changes in the elastic modulus due to temperature changes (this sentence requires careful analysis of its structure). Secondly, there are the operating condition parameters; in other words, when making a selection, it is necessary to consider which parameters are relevant in actual operating conditions. These generally include: 1. Flow rate range ； 2. Pressure range ； 3. Medium temperature ； 4. Type of medium (pay special attention to corrosion) ； 5. Medium properties ； 6. Precision grade ； 7. Allowable voltage drop ； 8. Type of power supply ； 9. Output signal ； 10. Explosion protection ； 11. Protection... there are some others as well, but I won’t list them.