What are the different types of barcode scanners?
• Contact wand bar code scanners – These are the least expensive type of barcode scanners. They require the operator to locate the barcode and move the wand smoothly and slowly over the barcode. The operator must start scanning the barcode in the leading “quiet zone” (clear area approx 1/4 inch on both sides of a barcode) and not stop until reaching the trailing quiet zone. Operators typically must scan a barcode several times to get a successful read due to un-even wand movement and/or skipping the quiet zones. Due to these problems, wands are not recommended for most applications. • Non-contact passive bar code scanners (CCD) – These are low-priced scanners and are often called CCD scanners. They contain no moving parts making them very durable. These type of scanners typically must be held 2 to 3 inches away from a barcode for a successful read. The field of view of this type of scanner is limited and therefore they cannot be used for long barcodes (typically barcodes over 4 to 5 in
