retail security label: Magnetic systems?

Magnetic systems?

Magnetic tags are made of a strip of amorphous metal, also called metglas which has a very low magnetic saturation value and this strip is also lined with a strip of ferromagnetic material with a moderate coercive field (magnetic "hardness"), except for permanent tags. Detection is done by sensing harmonics and summ or difference signals generated by the non-linear magnetic response of the material under a mixture of low-frequency (in the 10 Hz to 1000 Hz range) magnetic fields.

When the ferromagnetic material is magnetized, it biases the amorphous metal strip into saturation, where it no longer produces harmonics. Deactivation of these tags is therefore done with magnetization. Activation requires demagnetization. Due to the convenient dimensions of the tags, and their very low cost, this system is popular in libraries and retail stores. Magnetic systems are often referred to as 'Electromagnetic' (or EM) systems. EM systems rarely appear in retail .

Cobra Tech Co.,Ltd

We are source tagging suppliers in China.

Our products are Acoustic Magnetic label and Radio Frequency label, it compatible with all existing security systems.

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