Yes, magnets set off store alarms. Therefore, there are unexpected situations where the alarm goes off. For example, if the customer hasn't stolen anything but the alarm goes off, the customer may unknowingly carry magnets. However, without theft detectors, security tokens would be useless. Detectors are usually located on both sides of each store exit. When the sensor passes the detection device, an alarm will sound. Thus, ensure you guide your cashiers on how to deactivate security tags in store correctly.