Abstract: Disclosed is a method of analysing a magnetic material which includes the construction of a signature S(H) of the magnetic material formed from at least two points S(H)P, this construction including obtaining the value of each point S(H)P by measuring, over each period fraction, the amplitude and possibly the phase of a harmonic of the magnetic field induced in the magnetic material, said amplitude and phase being obtained in response only to an excitation during this period fraction, the harmonic having a frequency nfH, where n is a non-zero positive integer; and the identification and/or the determination of the mass of the magnetic material from several points of the constructed signature S(H).

Abstract: The invention relates to a device for measuring the mass of a magnetic material (6) present in an analysis medium, that comprises: a modulator (24) of the phase of a high-frequency and/or low-frequency component of a magnetic field for exciting the analysis medium with a modulation signal having a value that is modified by a frequency fmod; and a demodulator (36) capable of demodulating the amplitude of an amplitude signal, measured in response to the excitation field, from the modulation signal, wherein said demodulator is connected to the output of a filter (34) and to the input of an estimation unit (44).

Abstract: The invention relates to a magnetic field sensor comprising at least one magnetic core (10) in which the magnetic cycle of the magnetic core is characterised in that the absolute value of the third derivative of the magnetic flux density in relation to the magnetic field is maximum for a zero magnetic field.

Abstract: Disclosed is a method of analysing a magnetic material which includes the construction of a signature S(H) of the magnetic material formed from at least two points S(H)P, this construction including obtaining the value of each point S(H)P by measuring, over each period fraction, the amplitude and possibly the phase of a harmonic of the magnetic field induced in the magnetic material, said amplitude and phase being obtained in response only to an excitation during this period fraction, the harmonic having a frequency nfH, where n is a non-zero positive integer; and the identification and/or the determination of the mass of the magnetic material from several points of the constructed signature S(H).

Abstract: The invention relates to a device for measuring the mass of a magnetic material (6) present in an analysis medium, that comprises: a modulator (24) of the phase of a high-frequency and/or low-frequency component of a magnetic field for exciting the analysis medium with a modulation signal having a value that is modified by a frequency fmod; and a demodulator (36) capable of demodulating the amplitude of an amplitude signal, measured in response to the excitation field, from the modulation signal, wherein said demodulator is connected to the output of a filter (34) and to the input of an estimation unit (44).

Abstract: The invention relates to a magnetic field sensor comprising at least one magnetic core (10) in which the magnetic cycle of the magnetic core is characterised in that the absolute value of the third derivative of the magnetic flux density in relation to the magnetic field is maximum for a zero magnetic field.