Wireless Three-Axis RF Magnetic Sensor

Mini Wireless Three-Axis Magnetic Sensor



  • Can measure the magnetic field in a cramped space where a measuring device and antenna cannot be inserted
  • Contains a three-axis ferrite coil antenna enabling highly sensitive and non-directional magnetic field measurement
  • Multiple units (100 units max) can perform simultaneous measurement
  • Standard calibration data provided: A2LS Accredited Calibration available (optional)
  • Include easy-to-operate software R2.0 using Microsoft EXCEL (user can customize the software)


  • Measure common mode current on automotive wire harness.
  • Noise measurement on actuators and/or motor inverters of cars and/or robots.
  • Measure weak magnetic field such as remote car key (Low frequency range).
  • Measure magnetic field of wireless sensor.
  • Evaluate link efficiency of wireless power transfer system.
  • Evaluate SAR (Specific Absorption Ratio) on human body.


Description Mini Wireless Three-Axis Magnetic Sensor (AEWP)
Size W:21.3 mm × D:52.8 mm × H:16.6 mm (Customizable)
Weight 20 g (Customizable)
Measurement method Magnetic field measurement using three-axis ferrite coil
Frequency From 100kHz to tens of MHz (Customizable to suit specific measuring needs)
Sensitivity From nT to 1000 uT (Customizable to suit specific measuring needs), automatic measuring range
Communication mode IEEE802.15.4 (2.4GHz band)
Communication range Over 10m possible (It may change according to ambient environment)
Number of sensor units Up to 100 units
Battery Lithium-ion battery (3V), Micro-USB rechargeable
Calibration data Standard calibration data, A2LA Accredited Calibration available (optional)
AccessoryEasy measuring software (R2.0) for Microsoft Office EXCEL
Certification of technical standards compliance Japan, US, Germany, and Spain (Please inquire for antenna information)

Patent pending

*Specifications and/or appearance are subject to change without prior notice for further improvement.We customize the product according to specifications.

Wireless magnetic field sensor



  • Small size, light weight, wide dynamic range, high accuracy
  • High sensitivity, can measure signals as low as 0.1nT
  • Multiple sensors can be used for simultaneous measurement
  • 3 axes (X, Y, Z) of each sensor can be measured simultaneously
  • Spectrum analyzer, oscilloscope, test cables unnecessary


  • 125kHz, 134.2kHz Smart key system
  • 85kHz Wireless charging system for electric vehicle
  • 20kHz - 90kHz IH cooking heater etc.


 SpecificationsConditions · remarks
Measurement frequency 125kHz、 134.2kHz ※1
Dynamic Range 86dB0.1nT - 2000nT Magnetic flux density (T)
Unit nT、 μT、 mT、 dBμV/m Measurement Software (Electric field intensity is converted to far field)
Accuracy Within ±5%(1nT - 1000nT) Accuracy for 0.1 - 1nT range within ±10% (same for < 1000nT)
Certified calibration A2LA certificate and traceability (Option)
Measurement signal Non-directional: Supports CW, burst signalSupports arbitrary burst signal
Frequency/Communication system 2.4GHz bandIEEE802.15.4、ARIB STD-T66 ※3
Software Excel VBAWindows OS
Battery Built-in secondary battery (Lithium-ion battery, charging with micro USB cable)
Temperature range -10℃  -  50℃ (Accuracy coverage 25℃ ± 10℃)※4
Outline dimensionsW 55mm × D 19mm × H 24mm Weight 20 grams

※1  Standard sensors support 125kHz and 134.2kHz but can be customized for other frequencies.
※2  Caution: Measurement less than 1nT is susceptible to external noise.
※3  Wireless technology conformity certification also applicable in Europe, USA, etc. Please contact us if using outside Japan.
※4  Please contact us if sensors will be used in temperature environment other than 25℃.

High accuracy measurement over a wide range

Supports burst waves of any pattern

Measurement accuracy example of CW wave
Measurement accuracy example of Burst wave

※Please contact us for desired burst pattern

A2LA certified calibration available

Constant magnetic field generator for calibration (Helmholtz coil)

Z axis, X axis calibration
Y axis calibration

※Helmholtz coil also available for sale

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