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 3-D magnetic field analyser with data logger

Revolutionizes the significance of long-term magnetic field recordings:

  • Parallel to the true 3D value of the magnetic field in the entire frequency range, the three axes of the field, railway (A/C) and mains current as well as natural and artificial harmonics ("dirty power") are recorded separately.
  • Powerful PC evaluation software NFAsoft included. Extensive graphics and statistics functions (eg 95th percentile, etc.)
  • Continuous measurement guaranteed - even intermediate maxima are stored 10 times per second on the supplied SD card.
  • Input socket for simultaneous RF recording with external RF analyzer or deeper analysis using current clamp / current loop.
  • Compact integrated sensor for the magnetic field allows precise measurement even in very inhomogeneous fields.
  • Li-ion batteries for 48 hours of uninterrupted recording at ten full data sets per second.


Further Information about the NFA series

Technical Data

Frequency range:

16 Hz to 32 KHz (compensated)

Measurement range:

Magnetic flux density: 1 - 19.990 nT


50 / 60 Hz: +/- 5 %

16 Hz - 30 kHz: +/- 1 dB

Isotropic deviation: +/- 1,5 dB

Offset +/- 3 Digits


magnetic flux density, 3D

Signal rating:

trueRMS, Peak, Peak Hold

Power supply:

7.4-Volt Li-ion high quality battery pack (included), average operating life in the logging mode 48 h

Low-batt indication

Auto-Power-Off function (saves capacity and is deactivated during longterm measurements)

Power supply unit included

Let's talk about its outstanding ability of harmonic analysis ("Dirty Power").

The NFA30M does not end at 2 kHz – with the help of a modified FFT it can even measure from 16 Hz to 30 (!) kHz, and that for at least 48 hours, continuously and without interruptions. While measuring, it makes 10 recordings per second of the respective maximum value of the expired tenth of a second, in parallel and separately representable in a graph for:

In addition to the very useful graphic plotting, the unique analysis software NFAsoft* is able to count the total of "steep edges" per hour (for instance caused by pulsed peaks of flux densitiy from electronic devices) either for the complete recording time or for any wanted zoom level. This way the building biology for the first time has the possibility of quantitative comparative parameters to analyse the impacts of such phenomena on human beings.