We have developed a hysteresigraph based on two digital voltmeters to
integrate the instantaneous electromotive forces induced in two indepe
ndent search coils wound around the sample when the applied field is c
hanged. The sensitivity of the equipment is 0.005 Tesla and the accura
cy is better than 3 %. A clear advantage of this system is its simplic
ity of set-up and usage, and the fact that the measurements are perfor
med almost statically.