An experimental determination of eddy current probe fields can be useful in several areas of nondestructive evaluation (NDE). In a very practical sense, a field map or profile is a good tool for examining the variations in probe performance. We show that probes of nominally identical construction can produce very different magnetic fields. Flaw inversion work in quantitative eddy current NDE requires an accurate knowledge of the near field produced by a probe. With the techniques developed in this experiment we have been able to map fields in considerable detail. We have done some experimental verification of theoretical models for fields produced by air core probes and mapped the fields of ferrite core probes which are difficult to calculate.