RFS-B 3-2型磁场探头的测量线圈安置在垂直于探头柄的位置。如此可以更好地靠近组装件的探头，从而获得高耦合性。 RFS-B 3-2 采集垂直于被测件的磁感线，而不采集在探头侧边出现的磁感线。
The RFS-B 3-2 is a passive near-field probe. Positioning the probe head vertically on the PC board sets the measuring coil directly onto the surface. This allows for measurements at hard-to-reach spots, e.g. between large components of on/off-controllers. The near-field probe has a sheath current attenuation and is electrically shielded. It can be connected to a spectrum analyzer or an oscilloscope with a 50 Ω input. It does not have an internal terminating resistance.