MET30+ Universal Waferthin


Lock Inspection Systems have broken new ground with an innovative installation in Indonesia, turning a challenging problem of very limited installation space into a successful metal detection solution.

The large and prospering pharmaceutical tablet and capsule manufacturing industry in Indonesia has long been a successful and fertile market for Lock metal detectors, but earlier this year one of the country’s leading pharma producers requested a suitable solution for their antibiotic dry powder line which required some ‘out of the box thinking’.

Traditionally powdered products are inspected either in their loose form in a vertically-installed ‘freefall’ detector, or after packaging on a conveyorised detection system, but for this particular application neither of these options could be applied – the design of the production line meant that there simply wasn’t the space available in which to install a vertical fall system, and the metallic ROPP caps used on the bottles after filling are an obvious bar to metal detecting at this stage.

Lock’s solution therefore was to supply a special ‘Compact’ version of the Waferthin metal detector, one which their Indonesian representatives PT Mandiri Sejati were then able to mount and fit into the very small space immediately above the filling machine, despite this being just 250mm deep (inclusive of the detector’s ‘Metal Free Zone’) and barely 300mm wide.

As the detector’s aperture is just 102mm diameter and its operating frequency 875khz, the achievable sensitivity to metallic contamination is excellent and consistent with other pharmaceutical product detector installations – upon identification of contamination, a reject signal is relayed to the filling machine, causing it to stop in order that the ‘offending’ bottle can be removed from the main flow.

Thanks to this successful new installation in Indonesia, Lock’s portfolio of solutions that can be offered to pharmaceutical manufacturers worldwide, particularly those of powders or granules into bottles where there are physical limitations as to the amount of space available, has now increased accordingly.