A gauss meter probe whose tip senses the magnetic field along the probe's long axis. Best for discs, pancakes, and donut coils where the field exits perpendicular to the accessory surface. Point the tip straight at the coil for a clean reading. Internally the Hall element is oriented so its sensitive axis aligns with the probe shaft, capturing the normal field component.
Gauss probes come in two shapes, and the shape sets which way the field must point to be read. A transverse probe ends in a thin flat blade and reads the field passing through the flat of the blade, so it is laid flat to the surface and can slip into edges and tight spots. An axial probe ends in a round rod tip and reads the field entering the end of the tip, so it is held along the axis and pointed straight at the surface. Either shape can measure the field at a surface or in the free space around a coil; the shape only changes how the probe is held to reach the spot.
