Abstract: The invention relates to a current sensor device for monitoring the current flowing through a brush, comprising: —a brush holder (12) extending in a longitudinal direction and defining a through-housing intended to accommodate a brush such that one end of the brush which is intended to brush against a rotating movable surface protrudes from the brush holder, a Hall effect sensor (14) arranged to detect a magnetic field; —a concentrator (16) for concentrating the magnetic fields in a concentrated magnetic field zone and for protecting the zone from external magnetic fields, in which: —the concentrator (16) is mounted on the brush holder (12) so as to surround at least part of the housing of the brush holder; —the Hall effect sensor is mounted on the brush holder (12) at a position located inside the concenrated magnetic field zone.

Abstract: The invention relates to a current sensor device for monitoring the current flowing through a brush, comprising: —a brush holder (12) extending in a longitudinal direction and defining a through-housing intended to accommodate a brush such that one end of tie brush which is intended to brush against a rotating movable surface protrudes from the brush holder, a Hall effect sensor (14) arranged to detect a magnetic field: —a concentrator (16) for concentrating the magnetic fields in a concentrated magnetic field zone and for protecting the zone from external magnetic fields, in which: —the concentrator (16) is mounted on the brush holder (12) so as to surround at least part of the housing of the brush holder: —the Hall effect sensor is mounted on the brush holder (12) at a position located inside the concenrated magnetic field zone.