For metal detection IFS version 4 states:
5.5.3 The metal or foreign body detector shall incorporate both an alarm, and where applicable, an automatic rejection device, which shall either divert contaminated product into a separate area, accessible only to authorised personnel, or for continuously extruded product only, identify via an appropriate mark the location of the contaminant. Only where automatic rejection or identification is not possible will a simple line stop be acceptable.
Our sister company in Germany has stop belt rejection systems and have not had a non conformance for this. However we had one detector with a stop belt and got a non conformance for it (quite right against this clause). Why would a German auditor not give a non conformance against this clause? Have you any ideas Peter?