KABMag
KABMag
Electromagnetic Flowmeter
The operation of magnetic flowmeters is based on Faraday's law of electromagnetic induction. Magmeters can detect the flow of conductive fluids only. The magnetic flowmeter consists of a non-magnetic pipe lined with an insulating material.
A pair of magnetic coils is situated as shown in Figure 1, and a pair of electrodes penetrates the pipe and its lining. If a conductive fluid flows through a pipe through a magnetic field density generated by the coils, the amount of voltage developed across the electrodes--as predicted by Faraday's law--will be proportional to the velocity of the liquid. Because the magnetic field density and the pipe diameter are fixed values, they can be combined into a calibration factor.
Advantages of using electromagnetic flowmeters include unrestricted pipe cross-section and independence of density and fluid viscosity. Performance is unaffected by changes in process pressure, temperature and fluid conductivity.
- High accuracy and repeatability
- Cost effective non-intrusive flow measurement
- Maintenance free
- Range from 0.17 l/s to 6360 l/s
- Range of liners and electrodes
- High speed microprocessor-controlled signal converter
- Empty pipe detection
- Pre-programmed and pre-calibrated to user's specific applications
- Bi-directional flow outputs and totalisation
- Meter is wet calibrated in SANAS traceable calibration facility
- Simple menu-driven touch control programming
- Calibration mode diagnostics
- Line sizes from 25mm (1") to 900mm (36")
- AC Coil excitation available
- Wafer/sandwich format available
A variety of lining materials are available to ensure compatibility with most applications:
| Neoprene | Used for applications where a combination of chemical attack and abrasive wear are present |
| Natural Rubber | Used for general applications |
| Polyurethane | Used for slurry flows that contain abrasive solids |
| Ebonite | Used for higher temperature general applications, Ebonite has a maximum temperature limit of 95°C |
| PTFE | Used in applications where chemical attack is likely |
KABMag
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