Turck says its analog+ proximity sensors have been enhanced to differentiate between various types of metal.
Available in ring and flat housings, the devices provide sensing ranges up to 11 mm and are suitable for stamping, die-cutting and metal-sorting applications, where different metal types must be readily and accurately detected.
The sensors use inductive coils whose RF fields are influenced differently for each metal type. The signal difference is then converted into a 0 to 10 VDC analog signal to signify the type of metal being detected.