On a method of measurement of small changes in magnetic induction by an oscillating magnetic comparator
V I Zaitzev · Journal of Physics E Scientific Instruments · 1973
In a double-coil magnetic comparator of the oscillating type certain systematic errors and limited sensitivity will exist due to the finite value of the amplitude of oscillation and to misalignment of the directions of the two magnetic fields to be compared. These effects are analysed, and it is concluded that even with a simple null detector the accuracy of the comparison may be of the order of 10-2% if reasonable care is taken regarding the alignment of the fields.