Monitoring device in a magnetic environment and method combines

The invention relates to an apparatus (1) for monitoring exposure conditions to which an operator or machine situated in a magnetic environment is subjected. The apparatus (1) according to the invention includes a portable module (2) for measuring, at a plurality of known times t, indicative data including the three components of a magnetic field vector, a portable module (3) for determining the three components of a traveling speed vector, and calculation means (4) for estimating an induced current passing through the operator or machine from the magnetic field and traveling speed vectors. The invention likewise relates to a method implemented in the apparatus according to the invention.