Hard EAS sensors (anti-theft tags) are used for prevention of theft of various categories of goods in stores and supermarkets. Such sensors are made typically of plastic, and can be attached to the goods by several ways: with use of ropes, needles (nails) or elements of sensor (nails integrated in one of the components of the device). After making a purchase hard sensors are removed from the product by special equipment, and then can be reused. Fixing of hard EAS sensors is high-effective and easily defined by anti-theft gates, that makes them very useful. Hard sensors can be used in shops, supermarkets and hypermarkets to prevent theft of various categories of products - bottles of alcohol, different clothes, etc.