The invention relates to a measuring arrangement comprising: a coil arrangement for creating a magnetic field to measure a sample to be arranged in connection with it including at least one flat coil, the coil geometry of which is arranged to be changed in the direction of the plane defined by the coil arrangement, in order to create a spatially changing magnetic field having a known distance dependence for measuring the sample; and electronics connected to the coil arrangement for creating a magnetic field using the coil arrangement; and means for changing the position of the sample and the coil arrangement relative to each other in order to change the magnetic field affecting the sample and having the known distance dependence. In addition, the invention also relates to a method for measuring a sample.
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