Walsn – Eletromagnetic Flowmeters

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1. Overview
Walsn SX Series magnetic flowmeter is ideal for highly reliable detection of conductive liquids in a wide variety of application. It uses advanced excitation technology which assures efficient measurement. Users can also benefit from flexible options without spending a lot money.
2. Operation Principle
The operating principle of the electromagnetic flowmeter is based of Faraday’s Law of induction. When a conductive liquid passes through the flowmeter tube axis, the magnetic field lines are cut by the liquid. This results in induction potential, which is detected by the two electrodes installed in the tube wall perpendicular to the measuring tube axis and the magnetic field.
The induction potential is proportional to the magnetic induction, the distance between two electrodes, and the average flow rate of fluid. Since the magnetic induction and the distance between two eletrodes are constant, the signal voltage is proportional to the average flow rate.
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3. Features
– Advanced Drive Technology
  The current tracking drive technology ensures a homogeneous magnetic field of coil current
Self -checking assures a reliable loop of excitation
Special Electrode Design
  Passivation performance of electrode ensures zero stability
Special-shape polished electrode without pollution
Reliable Security Protection
  Explosion-proof Technology fits the flowmeter into special environments
IP65/IP67/IP68
Lightning protection power supply design
Optional Functions
  Optional communication ports
Current loops and pulse outputs
Human Interface
  User-friendly interface
Easy to set up
LCD interface – high-quality display and free from light effect
High Efficient Interface-free Technology
  Anti-interference technology can efficiently eliminate the noise of external power supply
Granular noise eliminating calculation avoids medium interference
Self-diagnosis
  Monitor the conditions of current coil of excitation and electrode signal in real time
Monitor the operating conditions of communication ports in real time
4. Specifications
Standard SX-S (SX-SI, SX-SD)、SX-H (SX-HI, SX-HD)
Line size(mm)
1/ 2″ ~ 48″
Flow rate
≤ 15m/s ( 45ft/s )
Accuracy
±0.5% ( standard ) or ±0.2% ( high )
Repeatability
±0.15% ( standard ) or ±0.06% ( high )
Conductivity
≥ 5μs/cm ( Water ≥ 20μs/cm )
Pressure limits
≤ 4MPa (580PSI) 1/ 2″ ~ 24″
≤ 0.6Mpa (87PSI) 28″ ~ 48″
Electrode material
316L
Hastelloy
Titanium
Tantalum
Platinum-Indium Alloy
Tungsten carbide
Lining material
PTFE, PU, PFA, NR, CR, ETFE
Flange
ANSI/ JIS/ GB/ DIN
Process temperature
SX-SI/HI: -25 ~ +80°C , -13 ~ +176°F
SX-SD/HD: -25 ~ +180°C , -13 ~ +356°F
Ambient temperature
Ambient temperature effect
-25 ~ +60°C, -13 ~ +140°F
< ±0.1%/10°C ( 50°F ) or < ±0.25%/10°C ( 50°F )
Enclosure protection
IP65/ IP67; IP68 ( SX-SD only )
Electrical Connection
Seal M20*1.5 , G1/2 , 1/2 NPT
Cable Length
SX-SD: < 100m ( 300ft ) ( shielding )
Analog output error
≤ ±0.01mA
Approval
CSA , CE
Output interface
Analog output, pulse output
Analog output, pulse output, HART