PDK Metal detector for free fall applications
Gravity free-fall metal detectors are designed to detect and separate any metal contaminants from free-falling bulk materials (without the need to interrupt the production process).
Mode of operation
The basic element of each detector is a detection head fitted with electromagnetic coils. If a metal contaminant exceeding the pre-set sensitivity is detected in the material flow, the search coil of the free-fall detector sends a signal to the control unit, which automatically activates the pneumatic reject flap gate. It interrupts the vertical material flow and diverts a smaller amount of material containing the contaminant to the discharge outlet. Then the reject flap gate returns to its original position. The reject time is adjustable according to the individual client's needs.