MAGPy3 for In Situ Evaluations of WPT and other Sources

MAGPy3 is composed of the redesigned MAGPy3 probe (MAGPy3-8H3D+E3DV3) and the MAGPy3 Data Acquisition System (MAGPy3-DASV3, integrated with the probe), connected to the tablet PC with the intuitive touch-screen-based GUI. The induced E-field, current density, and SAR are assessed by using the novel generic gradient source model (GGSM).

MAGPy3 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

MAGPy3 basic configuration:

• MAGPy3-8H3D+E3DV3 probe (Flat Tip)
• MAGPy3-DASV3
• Surface Pro tablet PC incl. handheld-mount-adaptor
• Cables and chargers
• ISO 17025 calibration certificate
• Device case
• Manual (available in the software)

MAGPy Data Acquisition System

MAGPy-DASV2 specifications:

• 27 14-bit ADC channels with 25 MSPs for E-/H-sensors
• Peak detection stage
• Live data stage
• USB2 for data transfer to backend
• 22 tap FIR filter

MAGPy3-DASV3 provides all the features found in MAGPy-DASV2 and the following new functionalities:

• 27 14-bit ADC channels with up to 50 MSPs for E-/H-sensors
• 4 spare 14-bit ADC channels for future sensors
• a dedicated ADC channel for the reference probe
• USB3 for faster data transfer to backend
• 56 tap FIR filter

MAGPy Probe

Specifications of MAGPy-8H3D+E3DV2 and MAGPy3-8H3D+E3DV3:

• Probe head diameter: 60 mm
• 8H3D: 8 isotropic H-field sensors (1 cm² loop, arranged at the corners of a cube of 22 mm side length)
• E3D: 1 isotropic E-field sensor (dipole/monopole)
• Virtual center of all sensors: 18.5 mm from the probe tip
• Lowest H-field sensors: 7.5 mm from the probe tip
• Dimensions: 645 mm x 110 mm x 35 mm (MAGPy-8H3D+E3DV2 & MAGPy-DASV2), 600 mm x 115 mm x 40 mm (MAGPy3-8H3D+E3DV3 & MAGPy3-DASV3)

Sensor specifications:

• Frequency range: 3 kHz – 10 MHz
• H-field dynamic range: 0.1 – 3200 A/m (0.12 μT – 4 mT)
• E-field dynamic range: 0.08 V/m – 2000 V/m

The MAGPy software (SW) V3.0+ 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 status)
• Evaluation frequency & bandwidth
• Safety standard
• Induced E-field or current density, SAR
• Spectrum & zero-span of 3D E-&H-fields 
• Zero-span of H-field gradient
• Time-domain envelope of E-&H-fields (MAGPy3 probe required, will be available in MAGPy V3.2 SW)
• Data logging (snapshot / data-export option)

The latest software and firmware can be downloaded here.

The MAGPy V3.0+ desktop application includes an HTTP server that exposes a REST-like application programming interface (API). 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

Watch this video to experience the MAGPy-API.

See verification sources 

MAGPy Version 2 (w/o tablet): 645 mm x 200 mm x 47 mm, 2.40 kg 

MAGPy3 (w/o tablet): 645 mm x 202 mm x 52 mm, 1.98 kg

0 °C – 35 °C 

Validation document available

MAGPy V3.0+ enables exposure evaluation and compliance assessment against reference values and basic restrictions according to:

• ICNIRP 1998
• ICNIRP 2010
• ICNIRP 2020
• IEEE C95.1-2019
• FCC
• Health Canada Safety Code 6

MAGPy V3.0+ is fully compliant with:

• Near-field WPT: IEC/IEEE 63184 (Tier 3 and Tier 2) 
• FCC KDB 680106 D01 (coils >100mm)
• ISED Canada SPR-002 (coils >100mm)
• ISED Canada RSS-102.NS.MEAS (coils >100mm)
• 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 3 kHz – 10 MHz
• Large dynamic range (covering fields from <1% to up to four times the occupational limits)
• Excellent isotropy in near-field (errors of large probes >4 dB)
• High sampling rate (25 MHz for MAGPy Version 2, up to 50 MHz for MAGPy3)
• Reliable H-field measurement (1 cm2 loop sensor, gradient-based field extrapolation)
• Simultaneous E- and H-field measurements
• Determination of field gradients
• Estimation of induced fields with GGSM method and capacitive coupling formula
• User-friendly touch-screen-based GUI
• API supporting Python/Matlab interface

Benefits

• Confidence in capturing all incident fields close to source
• Assessment of compliance with reference levels and basic restrictions
• The only instrument that can determine compliance with basic restrictions in situ (reduction in exposure overestimation compared to reference-level-based approach in high gradients >40 dB)
• All-in-one device equipped with touch-screen-based GUI and embedded software for compliance testing
• Compatible with the latest standard IEC/IEEE 63184

The measurement technology and method were developed in collaboration with the IT'IS Foundation, ETH Zurich and were co-financed by INNOSUISSE.   

MAGPy Version 1 is discontinued and upgrades to MAGPy Version 2 are available. 

September 2025 (MAGPy V3.0)