Metal Defender who provides Metal Defender MD-6, MD-12 and MD-33 Walk Through Metal Detector technology was recently approved and awarded the Developmental Testing and Evaluation Designation by the Department of Homeland Security.

The question arises when considering the purchase of Walk Through Metal Detectors.
How many zones do I need. Metal Defender promotes the use of its new MD6/12 6 zone or 12 zone operating system because of simplicity to program and affordability and reliable performance.