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Summary
The electromagnetic flowmeter is composed of two parts by electromagnetic flow sensor and electromagnetic flow converter.The operation of an electromagnetic flowmeter is based on Faraday law of electromagnetic induction.The mainly parts of the sensor are: measuring tube,electrode poles,excitation coil,iron core,yoke and housing. The measuring tube of the sensor is a short alloy tube whose diameter is D, the inner surface of it has an insulating liner.Two electrodes are fixed in the measuring tube along with the diameter direction of it and they usually flush with the inner surface liner.When excitation coil pulsed by two-way square wave,there generates a working magnetic field with a flux density B in the vertical direction of the measurement axis.In the meantime,if some electrical conductivity liquid flows at an average velocity V through the measuring tube ,cuts lines of the magnetic field,there generates induced electromotive force E.Electromotive force E is directly proportional to the product of flux density B、measuring tube diameter D and average velocity V,that's: E BVD. Electromotive force E(flow signal) is measured by the electrodes and transmitted to transducer through cable.After the transducer handles the flow signal by magnifying it, the flow and total amount can be displayed,also will output pulse and analog current etc.
Main technical parameters
Technical parameters of whole flowmeter and sensor
±0.5% of indicating value(flow velocity 0.8m/s); ±4mm/s(flow velocity<0.8m/s )
Fluid Conductivity
≥5uS/cm
Nominal Pressure
4.0MPa
1.6MPa
1.0MPa
0.6MPa
6.3,10MPa etc.
DN3~DN150
DN15~DN600
DN200~DN1000
DN700~DN3000
Special Ordering
Lining Material
PTFE,Poly neoprene,Polyurethane,F46,PFA with net
Sensor
-25 deg.C~+60 deg.C
Convertor and integrated type
-10 deg.C~+60 deg.C
Fluid Max.Temperature
Integrated type
70 deg.C
Separated type
Poly Neoprene Lining
80 deg.C;120 deg.C(notes in order)
Polyurethane Lining
80 deg.C
PTFE Lining
100 deg.C;150 deg.C(notes in order)
FEP Teflon
PFA with net
Material of signal electrode and ground electrode
SS316L,HastelloyB,HastelloyC,Ti,Ta,Platinum-iridium alloy,Stainless steel coating with tungsten carbide
Electrode drawknife apparatus
DN80~DN3000
Connection flange material
Carbon steel
Connection ring material
Stainless steel1Cr18Ni9Ti
Enclosure protection
ND15~DN3000 separated sensor with rubber or PU lining
IP65 or IP68
Integrated(rounded converter)
IP65
Other sensors and separated converter
IP65
Explosion proof sensor and converter
IP65
Spacing(separated type)
Normally the separation distance between converter and sensor is less than 100m,if more please order specially.(Note: our company provide 10m length standardly,if need more, please indicate the length in order, and the cost will be add more)
Output of analog current
0~10mA load resistance 0~1.5Ω
4~20mA load resistance 0~750Ω
Frenquency output
1~5000Hz
Pulse output
Separated type output by two way: forward and reverse flow; integrated type output one way
Frenquency range:0~5KHz,uper limit 1~5 optionally
Square wave or pulse with 25ms pulse width
Transistor switch output with isolation protection,can absorb 250mA current and withstanding 35V voltage
Two-path alarm output
Alarmable(programable)high/low flow,blank pipe,fault condition,forward and reverse flow,simulation volume exceeds range,pulse volume exceeds range,disconnect pulse small signal
Transistor switch output with isolation protection,can absorb 250mA current and withstanding 35V voltage(Not isolated with pulse output)
CHENGFENG FLOWMETER intelligent electromagnetic flowmeter is based on a standard manufacturing system and development, its advanced design concepts to ensure the high precision and high reliability of the product, compared with the old electromagnetic flowmeter, it has high measurement precision, high reliability, good stability, complete function, long life and other advantages.
CHENGFENG FLOWMETER for flowmeter market customer demand, carry on the improvement of professional products, technology research and development, and strive to make customer satisfaction of the flowmeter.CHENGFENG FLOWMETER variety, style complete, direct manufacturers, quality assurance, affordable, welcome customers to come to consult, the choose and buy.Changzhou into feng help selection, solve your doubt flowmeter.