The
Metrolab THM 7025 is a low cost, hand held, three
axis Hall effect Teslameter (also known as a gaussmeter
or magnetometer) that utilizes a unique three dimensional
Hall effect sensor. Commonly available single axis Hall
effect teslameters or gaussmeters only measure the component
of the magnetic field intensity in one direction, either
transverse or axial with respect to the probe. Complete
characterization of the magnetic field at any location
requires measurement of three mutually perpendicular field
components (Bx, By, and Bz) and vector addition of the
components to calculate the total field (B). This is a
tedious, time consuming exercise requiring experience
in magnetic field measurement. The Metrolab THM 7025
measures the three components Bx, By, Bz and then the
total field is automatically calculated and displayed.
The THM 7025's key pad gives the operator complete control
over the different measurement modes, and all of the functions
are accessible for computer control via the built-in RS-232
serial interface.
Common applications would include: safety control in MRI
environment e.g. 5 Gauss line detection, permanent magnet
QC, mapping of magnet fringing field contours, evaluating
magnetic shielding effectiveness. We are developing a
series of Articles
(Technical Notes) regarding magnetic field measurements
and instrument applications.
The below products are mechanically and functionally similar |
Narda Model |
Metrolab Model |
ETM-1 |
THM-7025 |
The Metrolab THM-7025 is for measurement of DC fields only. For AC field measurement products (most 60Hz meters do not measure DC fields) please refer to Ametes MFS-3A, Bartington Mag-03, and/or ETS-Lindgren.
Last updated on: 23 November, 2016
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