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Space-Magnetic Field Visualization System EPS-02EMF System

Space-Magnetic Field Visualization System EPS-02EMF System

         Product catalog




The system detects position of the magnetic field sensor on the basis of the image on the camera first of all and then, recognizes strength of the signal that is measured by the sensor upon frequency analysis of the signal almost simultaneously.

Finally, visualization of the strength dispersion in composition with the real image of the measured object can be realized on screen of PC.  In terms of magnetic field in low frequency, International Commission on Non-Ionizing Radiation Protection (ICNIRP) published “FOR LIMITING EXPOSURE TO TIME-VARYING ELECTRIC AND MAGNETIC FIELDS (1HZ - 100 kHZ). Also, International Electrotechnical Commission (IEC) and Japanese Industrial Standard (JIS) have provided the measurement criteria.

Especially in fields of advancing home appliances which efficient power invertors are built in, power generation equipments like photovoltaic applications, railroad vehicles, charging stands which are expanding rapidly accompanied with spread of electric vehicle (EV) and plug-in hybrid vehicle (PHV) and wireless power supply, this system can surely contribute to drastic reduction of manpower on the countermeasures.


  •  Measurements specified in ICNIRP2010, IEC 62233 and JIS TS C 0044 conductible.
  • High responsiveness following to the image realized regardless of figures or colors on the sensor part
  • Composite image of the actual image taken by the camera and the measured dispersion strength visualized
  • Taking the measurement conditions and environment inside a vehicle into the account, 5m extension cable is attached to the 3 axes magnetic field sensor.
  • High speed signal processing from the magnetic field sensor realized owing to high speed FFT available the oscilloscope in the frequency analysis.



  • Magnetic field sensor for the measurement (FT3470-91 by HIOKI Corporation)
  • Signal processor (R&SRRT0 1004-NSL by Rohde & Schwarz Japan)
  • Control software (with PC and camera)  




Measurement scene to an engine room


Magnetic field dispersion

in the engine room



Measurement scene to a panel

part inside a vehicle


Magnetic field dispersion on

the panel part



Sensor Model NO. FT3470-91 by HIOKI Corporation 

Measurement frequency  10H ~ 400kHz
Sensor  Loop coil  Cross-sectional area  100cm²
Measurement axis X, Y , Z
Rated magnetic flux density    2mT
Measurement mode Magnetic flux density  10Hz~400kH, 10Hz~2kHz, 2kH~400kHz
Exposure level General Public / Occupational
Measurement range Magnetic flux density  2μT/20μT/200μT/2mT *Rated magnetic flux density: 2mT
Exposure level 20%/200%/2000%
Measurement unit Magnetic flux density  T / Exposure level %
Display renewal rate   Approx. 250ms
Interface USB 1.1

 Signal processor R&S ® RTO1004-NSL by ROHDE & SCHWARZ JAPAN

Oscilloscope Bandwidth  600MHz
Sampling rate  10G samples/s
ENOB > 7
Rise time  583 ps
Input sensitivity 1mV ~ in Base unit
Channel-to-channel isolation  > 60dB
RMS noise floor at 50 Ω   <=280μV at f.s. 200mV
Trigger jitter  <1 ps (RMS)
Waveform acquisition rate  >1,000,000 waveforms/s
At operation in FFT Noise floor -145 dBm/Hz (typical)
Updating speed Max. >=1,200 waveforms/s (typical)

Control software, PC and camera

Image division size Screen : 640 X 480 dot  Division size : 10~120 dot
Measurement mode Magnetic flux density / Exposure level
Measurement data  Normal / Hold
Measurement data Normal / Hold
Image display on camera Still image / Animation
Strength level setting Auto / Manual
Arbitrary function  Storage / Reading / Print-out / Export / Comment input
Corresponding OS Window XP / Vista  /  7
Others   USB cable attached

For further information, please download EPS-02EMF System catalog pdf .

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Designs and specifications are subject to change without notice.