The DC Magnetometer (gaussmeter) comes with a universal (axial/transverse) magnetic sensor and NIST - traceable certificate.
Another model of digital gaussmeter - without NIST certificate - is only $260 including shipping to US and Canada. Click here for a description.
This magnetometer measures in three ranges, and indicates the sign (north or south). An offset control on the gaussmeter lets you adjust the "zero" field level by ± 10 gauss. The gaussmeter's output is monotonic to the last digit (± 0.005%), linear to ± 1 % at 20,000 gauss, and overall accuracy is ± 2 % from 30 to 110oF. The meter comes with a NIST- traceable calibration certificate.
The DC Magnetometer has a minimum resolution of 0.01 gauss, or about 1/50 of the Earth field on the minimum range of 200 gauss. The maximum range is 20,000 gauss. (In comparison, the strongest permanent magnet material has an internal flux density or gap-magnet field of about 14,000 gauss. Measurement of the face of a single magnet will yield about 1/2 as much, or 7000 gauss at maximum.)
These gaussmeters can detect if magnets have lost their strength or check for field patterns. Unlike most digital magnetometers which are 3 1/2 digits, this one is 4 1/2 digits (20,000 counts both positive and negative magnetic polarity), so you can see very small differences in a strong field (such as 1 gauss at 19,000 gauss). The universal Hall sensor shown is 1.1mm thick x 4.3mm wide, on a one-meter-long plug-in cable. This standard sensor tip can be kept straight or bent at right angles repeatedly (it is shown bent in the picture), to measure magnetic field either parallel (axial) or perpendicular (transverse) to the cable direction. Update rate is 3 per second, but on the 199.99 (most sensitive) range, a 1-second time constant filter slows the response, and noise level is several hundredths of a gauss. For faster and more stable readings at these low field strengths, inquire about the High-Stability Version of this meter.
A typical use for the meter is measurement of permanent magnets, such as in DC motors. These can be partially demagnetized if driven beyond their amperage rating, even if for a brief time. Other uses include electromagnets, speaker gaps, and measurement of high current.
Available Options:
> Higher sensitivity: The High-Stability version of the DC Magnetometer is preferred for measuring residual magnetism in steel parts and for magnetic field mapping around large magnets. It is also $380 and has only one measurement range of .01 - 200 gauss. This version is more stable and has a faster update speed (in this low-field range) than does the standard DC Magnetometer. (Generally, the maximum residual magnetism that steel parts can retain is about 50 gauss.) A much higher sensitivity DC Milligauss Meter (0.00001 - 2 gauss) is also available.
> Output jack (DC - 2 KHz): Add $8.
> DC/AC Measurement Switch (AC is pseudo - RMS +/-3% 45 Hz - 2000 Hz. Measures 0.1 - 10,000 gauss AC): Add $40.
> Peak Hold: Displays the highest (positive) field reading since the "reset" button was last pressed. Add $80.
> External power plug-in (bypasses internal battery): Add $30.
> Dedicated axial probe (size of a pen): No extra charge. Just specify this type probe when ordering.
> Extra probes, axial or universal: Add $80 each. (One probe is included with each meter.)
> Special size or shape probes: Inquire.
> Audio alarm or magnet strength pass/fail test: Inquire.
> 2 - or 3 - axis meters: Inquire.
For more information about magnetic fields
DC Magnetometer (gaussmeter)
Minimum resolution is 0.01 gauss (However,
effective stability is +/- 0.06 gauss).
Maximum range is 20,000 gauss.
Includes a control box with battery and sensor on a one-meter-long cable. This meter also comes with a calibration certificate.
For information or to place
an order :
Call from (USA and Canada) 1-800-658-7030
(Elsewhere, dial *) 801-487-9492
Fax: 801-487-3877
* This
is a call to the USA . Country code is 1 .
E-mail: mail@trifield.com