Metal detector for use with oxygen absorption sachets

A&D Japan has released a metal detector which can check packaged goods that contain oxygen absorption (OA) sachets.

OA sachets contain metallic powder that reacts with and reduces oxygen contained within the packaging. Due to their strong metallic signature, the presence of OA sachets has meant that traditional metal detectors could not be used for final product inspection.

The company’s digital signal processing (DSP) technology has led to an innovation whereby a micro analysis tool built into the software of its regular metal detectors enables the sensor to differentiate between the distinct, strong signal created by the ferrous OA sachet and those created by much smaller metallic contaminants that could be present in the same package.

The metal detector can check for metallic contamination in the final product, while also checking for the presence of the OA sachet in the same pack, at the same time.