Acousto-magnetic systems
?
These are similar to magnetic
tags in that they are made of three strips, two strips of amorphous metal
and a strip of ferromagnetic material. They differ in that these strips are not
bound together but free to oscillate mechanically. Also the tag is active when
the material is magnetized. The detectors use a 58 kHz magnetic field which
induces mechanical resonance by magnetostriction .
When the excitating field is
turned off, these tags continue to oscillate mechanically, which produces a
magnetic signal because of the magnetized second strip. This signal triggers
the alarm. These tags are thicker than magnetic tags and are thus seldom used
for books. However they are relatively inexpensive and have better detection
rates (fewer false positives and false negatives ) than magnetic tags .
Cobra Tech Co.,ltd
Many products need to be affixed with anti-theft tags before
entering supermarkets/chain stores. We are a supplier of anti-theft tags. If
you need a security tag, please contact us.
Source tagging is the
application of Electronic Article Surveillance (EAS) labels into products or
packaging during the manufacturing or packaging process. with the world's
largest and most comprehensive programs. Products cover all categories, from
hard goods to soft goods. Hundreds of retailers representing more than 25,000
locations receive source tagged products, and thousands of manufacturers
provide source tagged goods to these retailers.
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Frank Fu
Cobra Tech Co.,Ltd
ShunDe,FoShan,GuangDong,528300 China
Tel:+86 757-63928676
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