Abstract: A security tag or device for use with a product package. The security tag has an optical sensor that is calibrated to an intensity of ambient radiation (or light, if any) within the package interior (e.g., from a source outside the package). The optical sensor can be aligned with an opening in the package to detect light. After calibration, a controller is used with optical sensor to determine changes in detected ambient radiation within the package, and rates of those changes. The security tag has an alarm adapted to provide an alert when a predetermined change in ambient radiation within a package is detected. Alternatively, the security tag can have an arm, with the optical sensor thereon, that extends from its housing for insertion into the package. A receiving opening can optionally be provided in the package for receipt of the arm.

Abstract: A product package assembly formed from a blank has walls for containing contents and a printed circuit. The printed circuit is connected to more than one of the interior surfaces of the walls. When assembled, one wall of the product package can be moved between an open position allowing access to contents in the product package via an opening and a closed position. The printed circuit extends across the opening such that in the closed position the printed circuit is connected, and in the open position the printed circuit connection is broken. If a wall is severed or torn, the printed circuit can also be broken. A security device can be removably connected to the package and provided in electrical communication with the printed circuit. The security device has an alarm adapted to provide an alert when conductivity of the printed circuit is broken.