摘要 |
Device for detecting electro-magnetically the level of a material which is conductive, or made conductive, particularly molten glass. The device comprises an inductor ( 32 ) creating an alternating current in the material and surrounding the container ( 24 ) of the material, at least one magnetic field sensor ( 52, 54 ) in the zone delimited by the inductor, this sensor comprising a pair of transductors making it possible to detect the partial differential, along the axis of the inductor, of the radial component of the field, means ( 68, 70 ) of demodulating the signals provided by the sensor, demodulation occurring with a phase shift of approximately pi/2 relative to the current supplying the inductor, and means ( 72, 74, 76 ) for processing the signals provided by the demodulation means and for providing a signal indicating that the sensor level has been reached by the material.
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