Metrolab's Magnetic Field Camera is the only instrument able to cover nearly all the magnetic measurement needs of MRI magnet production.
MRI magnets use iron shims and shim coils to compensate for field inhomogeneities. An accurate field map is crucial to compute the exact compensation required. After shimming, the field is remapped to verify the results, and, if needed, the entire process is repeated.
Using a single-point teslameter, shimming is extremely tedious at best. At worst, it will never converge. The Magnetic Field Camera simultaneously measures up to 32 points, and is now standard equipment for nearly all the world's MRI magnet manufacturers.
When a superconducting magnet is first "turned on," current is injected until the specified field has been attained. The power supply can then be removed, and the field is maintained by the current that continues to circulate in the superconducting coils. The Magnetic Field Camera allows this point to be determined with great precision.
Due to small shifts of the conductors in the strong magnetic field, a new superconducting magnet needs time to "settle down." The extreme resolution and stability of the Magnetic Field Camera allows this very slight decay to be observed in real time. Further measurements can be performed only when the field is stable – sooner would invalidate the measurements, and later unnecessarily prolongs the production time.
For situations where the field needs to be monitored over a wide range, or if several magnets need to be monitored at the same time, Metrolab recommends the use of one of its single-point NMR teslameters. For quick trouble-shooting, inside and outside the bore, Metrolab's hand-held three-axis magnetometer is the perfect companion for the high-precision NMR systems.
Metrolab is especially known for their precision NMR teslameters.
The Hall effect is the most common method for measuring medium to high fields, for a wide range of applications.
Fluxgate magnetometers evolved during the second World War as a means of detecting submarines.
(1) MagVector MV2 is uncalibrated.
(2) FDI2056 field range depends on coil area.
(3) MagVector MV2 range can optionally be set to 30 T (uncalibrated).
(4) Portability of MagVector MV2 depends on integrator's design.
(5) A < 10'000 CHF B 10'000 CHF - 30'000 CHF C > 30'000 CHF
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Compact but powerful USB instruments.