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Metrolab Three-Axis Hall Teslameter, THM 1176
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 The
Metrolab THM 1176 is a hand held, three
axis Hall effect Teslameter (also known as a gaussmeter
or magnetometer) that utilizes a unique three dimensional
Hall effect sensor. With field ranges of up to 20 T, accuracy of ±1%, precision of 3.5 digits, and a sample rate of up to 2 kHz, the THM1176 is particularly suited for high fields. 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 1176
measures the three components Bx, By, Bz and then the
total field is automatically calculated and displayed.
The THM1176 is available in two configurations:
Desktop kit: Utilizes a USB connector to connect to the probe to a computer with the supplied software that displays the total field and the components, numerically or graphically, records and plays back measurements, and allows you to scan a volume to find the maximum field value.
Handheld kit: Industrial quality handheld computer allows you to take the Hall Teslameter anywhere you need. A heavy-duty battery, plus a spare, provides an autonomy of nearly a full working day. The AC adaptor comes with plugs for Europe, UK, USA and Australia. The software has the same functionality as on the desktop computer; source code is included. A special USB adaptor cable provides easy synchronization with a PC - or you can use the built-in Bluetooth, WiFi or flash card connectors. It all comes in a convenient, padded carrying case..
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.
Last updated on: 18 March, 2009
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