Magnetic Instruments

Group3 Teslameters offer:

• Outstanding accuracy
• Extremely high resolution
• Small probe size
• Single probe covers all fields up to full scale.
• Noise immunity
• Interchangeable probes
• 1/3 19" Rack width
• 7 Digit display
• Group3 teslameters are the highest precision Hall effect instruments available - no other instrument can offer comparable specifications in the same price range.
• Group3’s unique linearization and temperature correction techniques have overcome the inherent problems of standard Hall effect devices.
• Every Group3 probe is individually characterised at many hundred field values, each at a range of temperatures. All this data is analysed by the calibration computers and the resulting correction coefficients stored in the probe itself.
• Advanced software algorithms in a Group3 Teslameter use the data to produce corrected field readings.
• No other instrument available approaches the thermal stability of the DTM-151 and LPT-141 combination - conservatively rated at 10ppm/° C maximum, but typically less than half of that.

The small active area of a Hall probe is ideal for field mapping. It offers particular advantages in regions of non-uniform field, for making measurements "on-the-fly" (when moving the probe through a field region), and also for measuring AC magnetic fields. These are applications where NMR based teslameters do not operate well. The high precision Group3 teslameters offer near equal resolution, can operate in all these difficult areas, and cost far less than an NMR system.

Because the characterisation data for each probe is permanently stored within the probe plug housing itself, any Group3 probe can be used with any Group3 instrument. Probes and instruments can be swapped around while still maintaining the full accuracy of the system.

The sophisticated drive methods employed, and the very special cable used for the probes permit large separations of probe head and instrument. Probe cables can be manufactured up to 30 metres in length.