I'm Not Crazy -- It's Them
Gail-Tzipporah Saunders

Attention, Walmart Shoppers

Posted Monday, December 26, 2011, at 7:24 PM
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  • Info only:

    Those little tags Wal-Mart sports on all it's merchandise - those are Radio Frequency ID tags (RFID) - the tags in most cases also bear a barcode. Despite what some might "think" the use of RFID tech is primarily for inventory purposes. But it should be known, there's an alerting device installed within all the frames at the points of ingress/egress. That alerting device (actually more properly, a transceiver) is dual purpose.

    When an item is passed over the barcode scanner at checkout, an electronic impulse is supposed to be emitted at the point the barcode is read, deactivating the RFID tag. But for safety-reasons, often the impulse isn't adequately powerful to deactivate the tag. Especially true at times of high use - such as Christmas shopping.

    Sometimes the checker-outer will advise a customer "the greeter/door person may ask to see your receipt" - those sometimes are occasioned by the checker-outer noticing the capacitor in the barcode scanner hadn't fully re-charged to deliver the knockout the RFID requires to deactivate.

    But at times - again, high shopping traffic, like Christmas shopping - the checker-outer might not notice.

    Better the greeter ask to look at the receipt than a customer attempt to exit the store and inadvertently trip the alert in the doorframes.

    -- Posted by HDucker on Sat, Dec 31, 2011, at 6:22 PM
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