The Checkrite validators are stand-alone systems that are fitted to a production line, and they comprise a control box, a scanner and a sensor. They are PLC (programmable logic controller) based systems that can provide a visual indication of the validity of a barcode, as well as halt the line if an incorrect barcode is scanned.
Before starting a production batch, a correct barcode is scanned and all subsequent barcodes must match this first one. If a different barcode is scanned, a red warning light will show, and the system can trigger an ejector arm, audible warning or line-stop. Missing or unscannable barcodes will prompt an amber warning light. A constant green light means everything is all right.