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MAGPy V1-0 for In Situ Evaluations

The Magnetic Amplitude and Gradient Probe System (MAGPy V1-0) was specifically developed for exposure and compliance evalautions of wireless power transfer (WPT) systems and any other strong magnetic near-field sources operating at frequencies of 3 kHz – 10 MHz with respect to reference levels and basic restrictions. The probe is constructed of 24 small time-domain (TD) loop sensors arranged on the corner of a cube for determining the magnetic (H/B-) field amplitude and gradient, and of two dipole sensors and a monopole sensor to measure the electric (E-) field amplitude simultaneously. Conservative estimates of the induced E-fields, current density, and specific absorption rate (SAR) in the human body at any position are compared to basic restrictions, while the incident H/B- and E-fields are compared to reference levels and displayed in real time in the TD or frequency domain (FD) on the intuitive graphical user interface (GUI). By comparison with basic restrictions, MAGPy V1-0 lowers the overestimation introduced by compliance testing with reference levels by up to 40 dB. MAGPy is fully compatible with IEC PAS 63184:2021 (Clause 5.2.3 and 5.2.4). 

magpy visual web

magpy visual web



MAGPy V1-0 is composed of the MAGPy-8H3D+E3D probe and the MAGPy Data Acquisition System (MAGPy-DAS), connected to the tablet PC with the intuitive browser-based GUI. The induced E-field/current density and SAR are assessed by using the coupling transformation function.


MAGPy V1-0 is optimized for in situ exposure and compliance evaluations at any location with high fields, including:

  • Automotive/vehicular/train WPT
  • Industrial and utility (e.g., industrial welding, induction cooking, electronic article surveillance, and WPT)
  • Energy supply (e.g., installation and operators of WPT networks)
  • Ubiquitous devices equipped with WPT technologies (e.g., mobile phones, implantable medical devices, wearable devices, and Internet of Things (IoT))
  • High power electromagnetic (EM) sources 

Basic Configuration

MAGPy V1-0 basic configuration:

  • MAGPy-8H3D+E3D Probe
  • Surface Pro Tablet PC incl. handheld-mount-adaptor
  • Cables and chargers
  • Calibration certificate
  • Device case
  • Manual


MAGPy-DAS specifications:

  • 27x14 Bit ADC channels with 25 MSPs
  • Peak detection stage
  • Hardware supervising unit
  • Data transfer to backend
  • 22 tap FIR filter

MAGPy-8H3D+E3D Probe

Probe design:

  • Diameter: 60 mm
  • 8H3D: 8 isotropic H-field sensors (loop: 1 cm2; arranged at the corner of a cube of 22 mm side length)
  • E3D: 1 isotropic E-field sensor (dipole / monopole arm length: 50 mm)
  • Measurement center: 30 mm from the tip 
  • Dimension: 110 x 635 x 35 mm (MAGPy-8H3D+E3D and MAGPy-DAS combined) 

H-field specifications:

  • Frequency range: 3 kHz – 10 MHz
  • Measurement range: 0.1 – 3200 A/m, 0.12 μT – 4 mT
  • Gradient range: 0 – 80 T/m/T

E-field specifications:

  • Frequency range: 3 kHz – 10 MHz
  • Measurement range: 0.08 V/m – 2 kV/m

MAGPy V1-0 is easy to use via its intuitive GUI installed on the tablet PC. The following is displayed in real-time:

  • Status bar (SW version, device/tablet battery statuses)
  • Evaluation frequency & bandwidth
  • Standard evaluation (RL and BR)
  • Induced E-field/current density & SAR
  • Time-domain 3D E-field (switchable to FFT spectrum) 
  • Time-domain 3D H-field (switchable to FFT spectrum)
  • Time-domain H-field gradient
  • Settings (recording, snapshot / replay option, standard selection, etc.)

The latest software and firmware can be downloaded here.

API (Application Programming Interface)

The MAGPy 1.0 Desktop application includes an HTTP server that exposes a REST-like API (Representational State Transfer). The API allows controlling parts of the application via HTTP requests as well as obtaining the same readings as those displayed in the user interface.

The interchange data format for both inputs and outputs is JavaScript Object Notation (JSON). The ubiquity of REST-like APIs and JSON allows easy integration in other services.

The MAGPy-API enables: 

  • complex scanning with a robot, e.g., below a car or inside the car 
  • remote or long-term monitoring of field levels
  • monitoring in high field strength or hazardous environments
  • applications where the field is to be measured at several peak frequencies under automated control

The feature is available in MAGPy 1.0 Desktop starting from version 1.0.36.

Watch the video here to experience the MAGPy-API.

Calibration Calibrated according to IEC PAS 63184:2021
ISO17025 accreditation pending 

See verification sources 

Dimensions & Weight

200 x 635 x 44 mm

2.2 kg (including tablet PC)

Temperature range

0 °C - 35 °C 

MAGPy Validation 


EM Safety Guideline Compatibility

MAGPy evaluates the reference values and basic restrictions according to:

  • ICNIRP 1998
  • ICNIRP 2010/2020
  • IEEE 2019
  • FCC 2020
  • HC Code 6
Standard Compatibility

MAGPy is fully compliant with:

  • IEC PAS 63184:2021 for WPT (Tier 3 and Tier 2) 
  • Induction heating (LF): EN 50519
  • Electric arc or induction smelting
  • Household appliances: IEC/EN 62233
  • RFID/EAS: EN 50364, IEC/EN 62369-1
  • Medical devices: IEC 60601
  • Electronic / electrical equipment: IEC/EN 62311
  • Workplace assessment: EN 50499
  • Assessment of workers bearing AIMDs: EN 50527-1
  • Human exposure assessment: EN 50413

Unique Features

Wide Frequency Range 

H-Field Sensors  

E-Field Sensors  

Measurement Range   

Gradient Range 

Sampling Rate


API Interface  

3 kHz – 10 MHz

Multiple 1 cm2 loop sensors

Sensors integrated in the probe sphere

0.1 – 3200 A/m (0.12 μT – 4 mT)
0.08 V/m – 2 kV/m

0 – 80 T/m/T

25 MHz (real-time decimation supported for H/B-field sensors)

Easy to use

Python based


Basic Restrictions & Reference Levels

Increased Accuracy 

Large Dynamic & Frequency Range  

Novel Standardized Compliance Testing Method 

Reduced Interference  

All-in-One Device


Standard Compatible


Only instrument that can determine compliance with basic restrictions in situ (gain compared to reference levels in high gradients >40 dB)

High spatial resolution (1 cm3)
Excellent isotropy in near-field (errors of large probes >4 dB)
Determination of field gradients

Covers the major range of near-field WPT sources
Measures fields from <1% to up to four times the occupational limits

MAGPy: estimation of induced fields and SAR through amplitude and gradient information (GGSM method)

Low interaction with the measured fields

Measures incident (H/B/E-) fields for assessment of compliance with reference levels and basic restrictions

Fully equipped with web-based GUI and embedded software for compliance testing

Compliance testing procedure in line with the latest standards (IEC PAS 63184:2021)

Confidence in capturing all fields close to source and with small measurement uncertainty

Compatibility DASY8 Module R&D
Product History

Release Date

June 17th, 2021

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