Research Area

Magnetic and Optical Systems

NMR Magnetometer

With an NMR Gaussmeter magnetic fields can be measured very accurately. The method is based on nuclear magnetic resonance (NMR). Accuracies up to 1 mG (0.1 µT) can be achieved with a drift of 1 ppm max/year. The system is used at INNOVENT as a reference for measurements in Helmholtz coils and electromagnets.


Application examples:

  • Measurement of magnetic stray fields (homogeneous)
  • Reference in calibration and surveying equipment such as Helmholtz coils and electromagnets

Device configuration

  • Available samples at INNOVENT:   0.04 – 0.2T / 0.16T – 0.8T / 0.42 – 2.1T
  • Field range (reality):   0.02-2.10 T / 0Gauss-200G (Hall Option)
  • Resolution:   0.1 µT (1mG)
  • Absolute accuracy:   <+/-0.5µT
  • Relative accuracy:   <+/-0.1µT
  • Internal stability of the time reference:    +/-1ppm (0°C-70°C)
  • Aging of the internal time reference over 1 year:   <1 ppm
  • Aging of the internal time reference after 1 year:    <+/-0,2 ppm /year
  • Measuring frequency:   2 Hz
  • Required homogeneity:   200 – 1000 ppm/cm
  • Channels:   1 to 64
  • Control by external PC Local, RS232, TCP/IP, MODBU


Other Measuring Instruments





Michael Röder

Magnetic Measurements

Phone: +49 3641 282564