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7
0
1
7
8
7
2
.0
6
0
9
/2
0
1
8
C
H
/E
N
09
electrode
Excitation coil
3.10 Maximum signal transmission distance between sensor and converter：
3.11 Flowmeter output signal：
E = K B L V （tt） In the formula: E——induction electromotive force, volt;
ABS、PTFE
60℃
3.7 Measuring tube (measuring head) material：
3.8 Maximum temperature of measured medium：
3.9 Enclosure rating：
Meet the relevant regulations of GB4208-2008 standard IP6S.
50m （Contact factory for special requirements）
DC current: 0 ~ 10mA load resistance is O ~ lkQ; 4 ~ 20mA load resistance is 0-5000;
Frequency: l ~ 5kllz.
4.Working Principle And Structure
4.1 working principle
The sensor is actually a liquid flow rate measuring instrument, which is a flow rate measuring
instrument made by applying the principle of Faraday's law of induction. Figure 1 is a schematic
diagram of the basic working principle of a plug-in flow meter.
Use a long rod to insert a small electromagnetic flow sensor into a specified position in the pipe being
measured. When a conductive fluid flows vertically through the working magnetic field of the sensor
(when the converter provides the excitation current to the sensor, it will Generate working magnetic
field), which is equivalent to the conductor cutting magnetic field lines in the magnetic field. According
to Faraday's law of induction, it is known that an induced electromotive force is generated at both ends
of the conductor. The induced electromotive force is detected by a pair of electrodes in contact with
the fluid, and the magnitude of the electromotive force is proportional to the magnetic induction
strength B, the distance L between the poles, and the average flow velocity of the fluid. which is
B——magnetic field strength, Tesla;
L——distance between two electrodes, meter;
V——the flow rate through the flow rate sensor
central axis of the pipe under test. At this time, the flow velocity
be multiplied by a factor K.
(that is, the particle flow rate representing the specified
insertion point of the electromagnetic flow sensor. One is to
There are two methods for the company to insert the specified
sensor measures the flow velocity as the maximum flow velocity
insertion point of the pipe under test), m / s K-factor
insert it on the central axis of the pipe under test; Insert it on the
of the pipeline. The average flow velocity of the pipeline should
Intelligent Plug-In Electromagnetic Flowmeter Y
