Which inductive sensors can work in areas with a high magnetic field, e.g. in welding areas?
The inductive sensors SIEF are immune to magnetic fields. SIEN, SIEH, SIES and SIEA sensors are not usually influenced by permanent magnetic or audio frequency alternating current fields. Nevertheless, strong fields can saturate the ferrite core of these sensors and thus increase the sensing distance or even cause switching through. However, this does not cause permanent damage. High-frequency fields in the order of several kHz (SIEH- to -CR) or several hundred kHz can severely impair the switching function, as the oscillator frequency of these devices lies within this range. Screening usually remedies such problems.
