Brass Water Electromagnetic Flow Meter Electro Magnetic Flowmeter
Electromagnetic flow meters, or magmeters, are comprised of a
transmitter and sensor that together measure flow. The magnetic
flow meter’s sensor is placed inline and measures an induced
voltage generated by the fluid as it flows through a pipe. The
transmitter takes the voltage generated by the sensor, converts the
voltage into a flow measurement and transmits that flow measurement
to a control system.
A magmeter utilizes a set of coils and a pair of electrodes for
flow measurement. The meter’s coils are driven by the transmitter
with an applied current. Once powered, a magnetic field is formed
between both coils. When the pipe is full and the fluid begins to
flow, the force of the magnetic field causes the negatively and
positively charged particles of the fluid to separate as they pass
through the magnetic field. This separation causes an induced
voltage between the electrodes and sensor.
The flow principle behind magnetic flow meters is known as
Faraday’s Law, mathematically defined as E=k*B*D*V. The induced
voltage (E) is directly proportional to the velocity (V) of the
fluid moving through the magnetic field (B). The induced voltage is
carried to the transmitter through the electrode circuit. The
transmitter then converts this voltage into a quantifiable flow
velocity. The volumetric flow rate of the fluid is calculated using
this known velocity along with the area of the pipe.
Magnetic flow meters are well suited for a variety of applications
across a range of industries including pulp and paper, metals and
mining, water and wastewater, food and beverage, chemical and
petrochemical and oil and gas. Because the magnetic flow meter
design does not leave any protrusions or obstructions in the pipe,
they are able to accommodate an array of applications from clean
and sanitary liquids to slurries and highly corrosive or abrasive
fluids.
Features
1. There are no flowing and blocked flow parts in the pipeline of
the 50mm water oil electromagnetic flow meter, and there is almost
no additional pressure loss in the measurement.
2. The measurement result of the 50mm water oil electromagnetic
flow meter has nothing to do with physical parameters, such as flow
distribution, fluid pressure, temperature, density and viscosity.
3. The electromagnetic flowmeter uses a fast, high-precision 16-bit
embedded processor to enhance the measurement stability.
4. The 50mm water oil electromagnetic flow meter has
anti-interference and high reliability, and the measurement range
is up to 150: 1.
5. The flowmeter adopts ultra-low EMI switch, and the power supply
voltage range is wide.
Product Parameters
Product Name | Electromagnetic Flowmeter |
Repeatability error | +/-0.1% |
Accuracy class | 0.5 class, 1.0 class |
Measured medium temperature | Common rubber lining: -20~+60 ° c |
High temperature rubber lining: -20~+90 ° c |
PTFE lining: -30~+100 ° c |
High temperature vinyl lining: -30~+180 ° c |
Rated working pressure | pipeline: DN10~DN65: ≤ 2.5MPa;DN80~DN150: ≤ 1.6MPa; DN200~DN1200: ≤ 1.0MPa |
Flow rate range | 0.3~15m/s |
Measured fluid conductivity | ≥5μs/cm liquid |
Output | 4~20mA / 4~20mA + Hart |
Electrode material | 316L, titanium (Ti), tantalum (Ta), Hastelloy (H), Platinum (Pt) or other special electrode materials |
Working power supply | 85~265VAC / 24VDC / Battery |
Straight pipe length | pipe: ≥ 5DN in the upper reaches, downstream of greater than or equal to 2DN |
Connections | Flange |
Protection grade | standard: IP65; IP68(optional) |
Explosion-proof mark | mdllBT4 |
Deatail Images
Precautions
1. Try to avoid ferromagnetic objects and equipment with strong
electromagnetic fields, so as to avoid the magnetic field affecting
the working magnetic field of the sensor and the flow signal.
2. should be installed in a dry and ventilated place, to avoid sun
and rain, the ambient temperature should be -20 ~ +60 ° C, relative
humidity is less than 85%.
3. There should be plenty of space around the flowmeter for easy
installation and maintenance.
Installation requirements
The measurement principle of the electromagnetic flowmeter is that
it does not depend on the flow characteristics. If there is a
certain turbulence and vortex inside the pipeline, it will be
generated in the non-measurement zone (such as elbow, tangential
current limit or half-opening shut-off valve upstream). Measurement
is irrelevant. If steady-state eddy currents in the measurement
zone affect the stability of the measurement and the accuracy of
the measurement, then some measures should be taken to stabilize
the flow rate distribution:
A. Increase the length of the straight pipe before and after.
B. Using a flow stabilizer.
C. Reduce a section of the measuring point.
