Abstract: “The paper observes matter about identification of zone with a stable value of gradient in Faraday’s balance. This matter is solved by purpose obtained coordinate characteristics of magnetic field induction between pole pieces of such balance. The paper shows that such identification may be quite effective when given characteristic (usually it is non-linear and doesn’t yield to desired linear even local approximation) is curly, i.e. has an inflection. It is possible to make a linear approximation of rather shortly characteristic’s region, i.e. establish a stable values of induction pole gradient. It is also possible to get visualized extremum view of gradient induction characteristic: in the vicinity of its extremum gradient value are relatively stable”

Keywords: Faraday balance, magnetic susceptibility, specimen’s positioning area, «curly» field density (induction) characteristic, gradient extremum