Electromagnetic Flow Meter

The electromagnetic Flow meter is composed of a sensor and converter, works on Faraday”s electromagnetic indication principle, it has a dual cavity housing providing ease of wiring while isolating the electronics from the environment. LDG series continues the use of low-frequency excitation method and multiform lining allowing this magnetic flow meter to be applied to an even greater range of applications.

  • Fast response and high stability.
  • High Accuracy, 0.5%, 0.2% for flowrate
  • Dual cavity housing to separate electronics part from wiring part.
  • AC power supply common use (85~265vac).
  • High visible backlit LCD for easy operation.
  • Communication: E. G. RS485, RS232C, HART, Profibus, MODBUS etc.
  • BI-direction measuring and totalizing 
Model Q min(m3/h) Q min(m3/h) Dn (mm)
AYT- 10S 0.0283 4.24 10 4111001
AFT- 10L 4111002
AYT- 15S 0.0636 9.54 15 4111501
AFT- 15L 4111502
AYT- 20S 0.12 16.96 20 4112001
AFT- 20L 4112002
AYT- 25S 0.176 26.5 25 4112501
AFT- 25L 4112502
AYT- 32S 0.29 43.42 32 4113201
AFT- 32L 4113202
AYT- 40S 0.452 67.85 40 4114001
AFT- 40L 4114002
AYT- 50S 0.7 106 50 4115001
AFT- 50L 4115002
AYT- 65S 1.19 179 65 4116501
AFT- 65L 4116502
AYT- 80S 1.8 271 80 4118001
AFT- 80L 4118002
AYT- 100S 2.28 424 100 41110001
AFT- 100L 41110002
AYT- 125S 4.41 662 125 41112501
AFT- 125L 41112502
AYT- 150S 6.36 954 150 41115001
AFT- 150L 41115002
AYT- 200S 11.3 1690 200 41120001
AFT- 200L 41120002
AYT- 250S 17.6 2650 250 41125001
AFT- 250L 41125002
AYT- 300S 25.4 3810 300 41130001
AFT- 300L 41130002
AYT- 350S 34.6 5190 350 41135001
AFT- 350L 41135002
AYT- 400S 45.2 6780 400 41140001
AFT- 400L 41140002
Standard specifications

Measuring Range 
The velocity range is 0.3m/s to 15m/s. The minimum measurable speed can be one percent(1%) of the full range. 
Analog Output 
Current output: Fully-isolated 0~10mA/4~20mA 
Load resistance: O to 1.5k; 4~20mA, 0~750 at 4~20mA 
Base error: Add minus 10uA on top of the measurement error 
Frequency Output 
Frequency output is proportional to the flow percentage of the full range. It Provides fully isolated transistor open collector frequency output ranged from 1 to 5000Hz, the external DC power supply should not exceed 35V and maximum collector current is 250mA. 

Pulse output

The converter can output up to 5000cp/s pulse series, which is dedicated to external totalization. Pulse factor is defined as pulse width is selectable from 16ms, 33ms, 66mm, and so on. Photo-coupler isolated transistor open collector circuit is used for pulse output. The external DC power supply should not exceed 35V and maximum collector current is 250mA

Showing Flow Direction & Range

The converter is capable of measuring both forward and reverse flow and recognizing its direction. The converter output 0Vlow level for forward flow, while 12V high level for reverse flow. Alarm Output 
Two channel of photo-coupler isolated open collector circuit are used for alarm signal output. There are two alarm outputs: High limit alarm and low limit alarm. The external DC power supply should not exceed 35V and maximum collector current is 25OmA


The RS232C, RS485, HART, PROFIBUS, MODBUS Communication interface are embedded in the converter. Surge absorber is optional to protect the interface and converter.

Display Function

Flow rate can be displayed either in engineering units or in percent of span. Totalized volum in any engineering unit can be displayed by setting a totalizing factor. 

Input Contact

External contact ON or OFF signal can be used to remotely control the start/stop or reset of internal counter. 

Damping Constant

Damping time optional from 0.2 to 100s. 

Self Diagnostics Function

Converter failure, flow tube failure, erroneous setting, etc. Can be diagnosed and displayed. 

Data Security During power Failure: 
Data storage by EEPROM-no back-up battery required.

Case Material

Aluminum alloy

Sensor Material

Housing: Stainless steel(SUS304), Carbon steel(SPCC) 
Flange: Stainless steel(SUS304) Carbon steel(SS304) 
Pipe: Stainless steel(SUS304) 

Wetted Part Material

Lining: Rubber, PTFE, PFA 
Electrode: Stainless steel(SUS316), Hastelloy B,HastelloyC, Titanium, Tantalum, Platinum 

Normal Operating Conditions: 
Ambient temperature: -20 to 60 
Ambient Humidity: 5 to 95%RH 
Power Supply Voltage: 85 to 265VAC 
Power Supply Frequency: 47 to 63Hz 
Fluid Conductivity: 20Us/cm at least