How do anti-theft alarms work in grocery stores?

Question

I know that clothing stores items usually have some kind of RFID tags in them. But what about food items in grocery stores, say, a carton of milk? Are tags still embedded in them?

I’ve also read that scanning a barcode esentially deactivates the tag inside. But wouldn’t that mean that people can scan items and then not pay without setting the alarms off?

In: 0

Answer 1

Some shops use a form of magnetic sensor where the tagged item moving through the field induces an electric current in the sensor and sets off the alarm.