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MAGPy Version 2 for Evaluations of WPT and other Sources 

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SPEAG's MAGPy Version 2


What is MAGPy?

The Magnetic Amplitude and Gradient Probe System (MAGPy) is the most advanced solution for demonstration of compliance of wireless power transfer (WPT) systems and other near-field sources operating between 3 kHz and 10 MHz. We offer a handheld and a robot-based system: the handheld MAGPy is optimized for in situ evaluations (Clauses 5.2.3 and 5.2.4 of IEC PAS 63184), and the robot-based system, DASY8 Module WPT, enables direct comparison with the basic restrictions in the laboratory (Clause 5.2.5 of IEC PAS 63184). Both systems offer significant advantages over other instruments, reducing overestimation of exposure larger than 40 dB. MAGPy Version 2 is a redesign of MAGPy Version 1 (discontinued) that makes the system compatible with the latest regulatory requirements.


The probe of MAGPy 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. The 4 lower H-field sensors are located just below the surface and the E-field in the center of the probe surface (Version 2), which enables measurement very close to the electromagnetic (EM) source. These levels are directly compared to the reference levels.

The induced fields (E-fields, current density, and specific absorption rate (SAR)) in the human body at any position are instantly determined using the novel GMMS method defined in IEC PAS 63184. The E-field is also converted to the induced field using latest published approximation formulas. The conservatively estimated basic restrictions are compared to basic restrictions. 

The system is more accurate and results in less overestimation (up to 40 dB) than conventional devices. MAGPy2 is fully compatible with IEC PAS 63184. 

DASY8 Module WPT V2.0+

DASY8 Module WPT is the most accurate method to assess WPT exposure. It is based on the MAGPy Version 2 technology integrated in our DASY8 product line for high precision 3D robot-based scanning. It is the only system for demonstrating compliance of WPT devices according to Chapter 8 of IEC PAS 63184 and enables fully automated compliance testing compliant with FCC KDB 680106 D01 and ISED Canada SPR-002.

DASY8 Module WPT V2.0+ is using the MAGPy Version 2 system directly by replacing one of the sensors with the reference sensor that is connected to the probe. The MAGPy data acquisition system (MAGPy-DAS) is mounted to the DASY8 robot. The induced E-fields and SAR are assessed with Sim4Life’s Quasi-Static EM Solver (P-EM-QS) using only the measured data. The dedicated graphical user interface fully automates the testing workflow. 

The module determines compliance of WPT systems and magnetic field sources without overestimation. It is also more accurate than simulation-based evaluations as it is grounded on actual fields and does not require modeling of the device.


The two systems accurately measure the EM field in the time-domain at any high-field configuration and are especially suited to evaluate human exposure. Applications include:

  • 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 EM sources 
EM Safety Guideline Compatibility

Both systems permit compliance testing of devices with current guidelines for both the general public and occupational exposures, including: FCC, ICNIRP 1998, ICNIRP 2010, IEEE C95.1 2005, EU Directive 2013, HC Code 6, BGV B11, 26. BlmSchV. 

Standard Compatibility

MAGPy and DASY8 Module WPT are compatible with:

  • IEC 63184 PAS for WPT 
  • ISED Canada SPR-002 (2nd edition)
  • FCC KDB 680106 D01
  • Induction heating: EN 50519
  • Electric arc or induction smelting
  • Household appliances: IEC/EN 62233
  • RFID/EAS: EN 50364, IEC/EN 62369-1
  • Medical: 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