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Scanners

Scanners

Scanners: scanners are designed to read a variety of UPC bar codes and improve speed and accuracy during checkout.   The two most popular technologies used for hand held scanners today are CCD scanners and laser scanners.  CCD scanners are typically inexpensive, but usually have a very short scanning range: the item being scanned needs to be about 1 to 3 inches from the scanner.  Laser scanners, which use a beam of light to read bar codes, offer better scanning ability with the ability to scan at longer distances.  Laser scanners either use a trigger for initiating scanning or are auto sensing, which allows the scanner to turn on when an item is placed in front of the scanner, and then turn off again. Omnidirectional scanners, sometimes referred to as vertical scanners, send out 15 or 20 lasers beams simultaneously, letting you scan a bar code from any angle. Most scanners today are decoded and do not require a separate decoding box.  You need to be careful when selecting the type of interface for your scanner.  Most hand held laser scanners either use a Y-connector that plugs into the keyboard that allows the scanner to function as a keyboard input device or a USB scanner interface.


 
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