What is a Gaussmeter? What is it for?

In: Applications of magnets On: Hit: 121

Before purchasing a gauss meter or gaussmeter, it is important to clarify your application and the required requirements.


A magnetic field is not visible to the naked eye. However, its effects can be illustrated visually with the help of iron filings scattered on a sheet of paper. The magnetic field is able to organize the iron filings in such a way that they adapt to the invisible lines of the magnetic field. The strength and intensity of a magnetic field are expressed as a unit of Gauss. In addition to this Gauss unit (G), there is the Tesla unit (T). The ratio between the two units is 1T = 10 4 G = 1 Vs / m 2 (volts-second per m 2).

When its probe is placed close enough to a magnetic field, a GaussMeter is able to quantitatively detect this magnetic field and register its intensity in the Gauss or Tesla unit. There are two different types of probes, axial and transverse.



It is essential that the operator of a GaussMeter knows its functions accurately and can interpret the measurement results correctly.


-With the automatic zero function, a measured value can be reset, even if the probe is in the magnetic field and the magnetic field is still present.

-With the retention function, the current measured value can be frozen on the screen.

-The Peak Hold function captures and maintains the highest reading as the probe passes through the magnetic field.


The measured values ​​already registered can be saved for data capture purposes and retrieved for later evaluation.

The DC magnetic field currents can be read and measured using the CC function.

To capture the maximum positive peak when measuring these DC field currents, you need the DC peak function (Max).


Sometimes, for some evaluations, the mean square root of the measured values ​​is important. There is the AC RMS function for this.

The peak AC RMS (Max.) Function is designed to capture the maximum positive peak of multiple values ​​of the mean square root.


Of course, it is also possible to employ specifically qualified personnel, both to select and be responsible for the use of GaussMeter.



Before buying a GaussMeter, it is important to clarify whether an axial or transverse probe should be used. The axial probe consists of a cylindrical rod with the measuring sensor at its tip. To measure, the probeis placed with its axis perpendicular to the surface of the magnet to be measured. Of course, this is only possible if there is enough space above the magnet. In this way, for example, small neodymium magnets that generate a very strong magnetic field, can be measured.

To measure magnetic fields between small air gaps above or below magnets, the transverse probe is more suitable because it can get close enough to the correct measurement position when placed in the air gap.

Since the correct selection of the probe has a decisive influence on the correct measurement results, we recommend that you make use of our experience in this area. Contact us at any time and benefit from our many years of experience.



Magnetic field measurements are often necessary to measure solenoids (solenoids for electromagnets). Axial probes are generally used for this purpose.

In the case of a transverse probe, the sensor runs perpendicular to the axis of the probe, so that it can also be taken to measure positions in small spaces, such as air spaces between magnets.

The measurement of magnetic fields requires long experience, since even minor changes in the position and direction of the probe can lead to very different measurement results. This is also true when measuring magnetic fields of smaller permanent magnets, such as neodymium magnets. In any case, a GaussMeter must have a sufficient measurement range of up to 20,000 gauss, which is equivalent to 2 tesla.


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