The idea of fitting the tag during manufacture is appealing - provided it's a generic tag - like the barcodes on packets of cornflakes etc - so they will work with any detection system.

Otherwise it would be like having to buy your Kellogs cornflakes from Morrisons or Sainsbury because the barcode readers in Tesco and the Co-Op wouldn't recognise them - if you see what I mean - so the idea would fall at the first hurdle.

What range are these things detectable over ?


Today is the day you worried about yesterday - and all is well !