How Do Barcode Scanners Work?

Bar code scanners read an encoded imprint (the barcode), decode it, and output the information, usually in text format, through a USB or keyboard wedge connection to the computer. Two separate categories of barcode formats exist. The first step in deciding what kind of barcode scanner you need, is knowing whether you will be scanning 1D barcodes, 2D barcodes, or both.

1D Barcodes: These barcodes appear as a series of black lines with varying widths. The most common format is the the UPC format which is found on most consumer goods. A 1D barcode scanner works for all standard 1D barcode formats. 

2D Barcodes: These barcodes appear square in shape and contain data which is read both horizontally and vertically by the scanner. 2D barcodes require a scanner that has 2D capability. 2D barcode scanners are capable of scanning both 1D and 2D barcodes.

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