Product Description
Electromagnetic Flow Meters are based on FARADAY'S LAW INDUCTION. These meters are also called as
Magflow or Electromagnetic Flow Meters. A magnetic field is applied to the metering tube, which results in a potential
difference proportional to the flow velocity perpendicular to the flux lines.
The physical principle at work is Electromagnetic Induction and mathematically defined as E=k*B*D*V.
where, E = Induced Voltage (Linear with velocity)
K = Proportionality Constant
B = Magnetic Field Strength (Coil Inductance)
D = Distance between electrodes
V = Velocity of process fluids
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.
When a flowmeter is installed and activated, its operations begin with a pair of charged magnetic coils. As energy
passes through the coils, they produce a magnetic field that remains perpendicular to both the conductive fluid being
measured and the axis of the electrodes taking measurements. The fluid moves along the longitudinal axis of the
flowmeter, making any generated induced voltage perpendicular to the field and the fluid velocity. An increase in the
flow rate of the conductive fluid will create a proportionate increase the voltage level.
The meter features flanged construction and is available with choice of liner and electrode material. All meters consist
of a sensor and a converter that may be mounted integral to the sensor or remotely either with a field mount kit.
Technical Specification
Line Size | DN 25 DN 3000 mm |
Nominal Pressure | 0.6 - 1.6 Mpa (2.5Mpa/4.0Mpa/6.4MpaMax 42Mpa) |
Accuracy | +/-0.5%(Standard) |
Liner | PTFE, Hard Rubber |
Electrode | SS 316L, Hastelloy C, Tantalum |
Type | Integral type, Remote type with 10 mtr. cable |
Medium Temperature | -20~+80 deg C (Integral type) |
Remote type (Hard Rubber) | -10~+80degC |
Remote type (PTFE) | -10~+160degC |
Ambient Humidity | 5-100%RH (relative humidity) |
Conductivity | >15us/cm |
Protection Class | IP65 (Standard); IP68 (Optional for remote type) |
Process Connection | Flange (Standard), Wafer, Thread, Tri-clamp etc (Optional) |
Output Signal | 4-20mA (Standard) / Pulse (Optional) |
Communication | RS485(Standard),GPRS/GSM (Optional) |
Power Supply | Integral - 24 V DC , AC 220V Remote - 24 V DC (Standard) , SMPS AC 220V (Optional) |
Power Consumption | <20W |
Main Performances of the Electrode Materials
Electrode Material | Application |
SS 316L | Applicable in Water, Sewage and Low corrosive medium |
Hastelloy C | Be resistant to oxidable acid such as nitric acid, mixed acid as well as oxidable salt such as Fe+++,Cu++ and sea water |
Tantalum | Having strong resistance to corrosive mediums that is similar with glass. Almost applicable in all chemicals mediums except for hydrofluoric acid, oleum and alkali |