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