Electromagnetic Flow Meters Manufacturer

Electromagnetic Flow Meters


Description :

  • Magnetic Flow Meters Based on Faraday’s Laws of Electromagnetic Induction Whenever A conductor moves through a magnetic field of given field strength, a voltage is induced on the conductor proportional to the relative velocity between the conductor and the magnetic field. They offer true noninvasive measurements. They can measure reverse flows and are insensitive to viscosity, density, and flow disturbances. Electromagnetic flow meters can rapidly respond to flow changes and they are linear devices for a wide range of measurements.
  • Consists of electrically insulated or non-conducting pipe, with a pair of electrodes mounted opposite to each other and a flush with the inside walls of the pipe. A magnetic coil wound around the pipe so that magnetic field is generated in a plane mutually perpendicular to the axis of the flow meter body and to the plane of the electrodes. Electrically conductive flowing liquids works as the conductor. Here, Length = distance between the electrodes= Pipe Diameter. As the liquid passes through the pipe section, it passes through the magnetic field set up by magnetic coils, thus inducing a voltage in the liquid which is detected by a pair of electrodes mounted on the pipe wall. Amplitude of the induced voltage is proportional to the fluid velocity.
  • Electromagnetic Flow meters are based on Faraday’s law of Electromagnetic Induction. In Electromagnetic Flow meter, magnetic field is generated by a set of coils. As the conductive liquid passes through the electromagnetic field, an electric voltage is induced in the liquid, which is directly proportional to its velocity. This induced voltage is perpendicular to both the liquid flow direction and the electromagnetic field direction. The voltage sensed by the electrodes is further processed by the transmitter to give standardised output signal or displayed in appropriate Engineering Units on LED/LCD Display.
  • The flux density of the electromagnetic field in a given Flow meter and the distance between the electrodes are constant, therefore, the induced voltage is only a function of liquid velocity.


E = K.B.V D
Where E - Induced voltage -  Volume flow is calculated by equation :

  • K - Flow Tube Constant - Q = vD2π/4
  • B - Magnetic field velocity
  • V - Mean flow velocity - Therefore Q = E.D. π
  • D - Electrode Spacing - K.B.4
  • The induced voltage is not affected by the physical properties of liquid like temperature, viscosity, pressure, density and conductivity, as long as conductivity of the measure liquid is above minimum threshold level. For reliable measurement the pipe must be completely full of liquid. The electromagnetic field coil assembly is excited by pulsed DC technique, which eliminates the interfering noise and provides automatic zero correction.


Applications :

  • Chemical, Petrochemical and Process Industries
  • Fertilizer Industries
  • Pharmaceutical Industry
  • Water and Waste – Water (WTP, STP)   
  • Handle Slurries
  • Greasy materials
  • Corrosive fluids
  • Obstruction less, Full bore and low pressure drop
  • Bidirectional meter
  • Empty pipe detection
  • Works only on conductive fluids
  • Must be full at all-time (full flow)

Specifications

Pipe Sizes DN 10 to DN 1000
Liner PTFE (P) / Rubber (R)
Type Integral (I) / Two part (T)
Condition New


Technical Specification

Pipe Sizes DN 10 to DN 1000
Media Conductivity (Min.) 10 µS/cm
Pressure PN 40 up to DN 80,
PN 16 up to DN 200,
PN 10 up to DN 1000
Temperature
(PTFE Liner)
0 - 180 C with Remote 0 - 120o C with Integral 0 - 90oC max for other
Pipe SS 316 (Non-magnetic )
Liner PTFE / Rubber
Electrode SS / Hastelloy C / Ta / Ti
Flanges Carbon Steel / SS 304 / SS 316
Coil Housing Carbon Steel / SS, Epoxy painted
Transmitter Cast Aluminium (LM6) , Epoxy painted
Power Supply 240V AC, 50Hz
Analog Output 4-20 mA DC
Pulsed Output (Optional) Low Pulsed Rate Output 10 to 36000 pulses per hour
Communication Port (Optional) RS - 232 / RS - 485 MODBUS RTU Protocol
Maximum Load Resistance 1000 ohm
Response Time 5 seconds
Flow Velocity Range 0.3 to 10 m/s
Protection IP - 65
LCD Display 16 X 2 (Two Line) Backlit LCD
4 Digit - Flow Rate
8 Digit - Totaliser
Accuracy ±0.5% of measured value (normal)

Details

DN m³ / hr LPM DN m³ / hr LPM
10 0.282 4.711 125 44.18 736.198
15 0.636 10.601 150 63.61 1060.125
20 1.13 18.846 200 113.08 1884.667
25 1.766 29.447 250 176.69 2944.792
32 2.909 48.247 300 254.43 4240.500
40 4.523 75.386 350 346.31 5771.792
50 7.068 117.791 400 452.32 7538.668
65 11.944 199.1 450 572.47 9541.98
80 18.092 301.546 500 706.75 11779.169
100 28.27 471.166 600 1017.72 16962.003

Graph Image

Graph Image

  • Integral Version Electromagnetic Flow Meter

  • Remote Version Electromagnetic Flow Meter