FIELD: measurement technology. SUBSTANCE: sensor is designed to measure quasi-constant and variable magnetic fields of low levels and unspecified shape. Sensor of induced magnetic fields has inductor, case, permanent magnet and magnetic circuit located in case, magnetic screen housing C-shaped magnet and measurement winding so installed that section of sensor surface on side of poles of magnet and face surface of magnetic circuit are not screened. Poles are oriented relative to inductor and opposite face surface of magnetic circuit is matched with inner surface of magnet in point of its crossing with common symmetry axis of magnet and magnetic circuit. Measurement winding is uniform, its electric parameters are chosen in compliance with working range of measurement frequencies with account of given relationships. In agreement with another variant measurement winding placed inside magnetic screen is so mounted that section of surface of sensor on side of poles of C-shaped magnet and face surface of magnetic circuit oriented towards inductor are not screened. Opposite face surface of magnetic circuit is matched with inner surface of magnet in point of its crossing with common symmetry axis of magnet and magnetic circuit. Measurement winding is uniform and has electric parameters chosen in accord with same relationships. EFFECT: expanded application field thanks to enhanced sensitivity and widened measurement frequency range. 9 cl, 4 dwg
