A Gaussmeter uses a probe to measure the magnetic field around a magnet at a specific location. The user positions the tip of the probe on the magnet or a pre-determined location near to the magnet. The sensing area of a Gaussmeter probe is at the tip of the probe. The closer the tip is to the magnet, the stronger the reading. A fixture can be made that will allow you to measure parts at the same place of reference each time and get repeatable measurements.
A transverse probe is held parallel to the surface to be measured. A axial probe is held perpendicular to the surface to be measured.