Remote type electromagnetic flow meter adopts the principle of time difference measurement: one probe transmits a signal through the pipe wall, the medium, and the other side of the pipe wall, and is received by another probe.At the same time, the second probe also transmits the signal and is received by the first probe.Due to the influence of the flow velocity of the medium, there is a time difference Δt between the two.According to the calculation, the conversion relationship V=(C2/2L)×Δt between the flow velocity V and the time difference Δt can be obtained, and the flow rate value Q can be obtained.
Remote type electromagnetic flow meter has many advantages: high precision; large measuring range; measurement results are not affected by conductivity, pressure, temperature and viscosity; it is not in contact with medium, especially suitable for measurement of corrosive media; simple installation and low cost ;can be installed on existing pipelines without cutting off process pipelines;no spoiler, no need to reduce the diameter, no leakage, low cost; at the same time, the probe of remote type electromagnetic flow meter produced in China can cover the pipe diameter of DN6 ~ DN6500 range,which has the advantages of high cost performance and timely service of domestic products.
Application direction of remote type electromagnetic flow meter: the current industrial flow measurement generally has the problem of large diameter and large flow measurement difficulty. This is because the increase of the measurement pipe diameter will bring difficulties in manufacturing and transportation, and the cost will increase and the energy loss will increase.and the remote type electromagnetic flow meter can avoid these shortcomings. Because all kinds of electromagnetic flow meters can be installed outside the pipe, non-contact flow measurement,the cost of the instrument is basically independent of the diameter of the pipeline under test, while other types of products with the increase in caliber, the cost is greatly increased. Compared with the functional price of other types of flow meters with the same function, the larger the diameter, the better, and it is considered to be a better large-diameter flow measuring instrument. Remote type electromagnetic flow meter adopts advanced DSP technology and double UP high-speed processor, which increases the sampling frequency to 70ms and can be used to measure the change of fluid flow in a very short time.By erecting metal guided wave plate between pipeline and probe, the temperature of medium is reduced from 450℃ to below 200 ℃,which makes measurement possible, and has unique applications in the petrochemical industry, the nuclear power industry, and the heat transfer oil field.And the energy calculation function is adopted, and the temperature signal can be introduced while measuring the flow rate to obtain the energy parameter.