CCD - Pen - Barcode Reader and Laser Scanner

CCD Readers

No moving parts and very reliable. Needs to virtually touch the code to scan and has a limited width - i.e. the width of the read head - 65 to 90mm. No additional software required on PC. Available with PS2 keyboard wedge, RS232 (serial) USB and varieties of terminals. Connects to Mac or PC with USB

Used in stores where the throughput is not very great - bookshops and libraries

Linear Imagers

One of the more recent developments in bar code scanning technology. Can scan up to 14" away like a laser and has a super fast decode - scans up to 270/sec! Will scan in full sunlight.

Connects via PS2, RS232, USB, terminals, thin clients etc. No moving parts - the better ones are guaranteed for up to 5 years!

Many in use in Hospital medical records departments  and other document handling departments Also being used in industrial applications where their durability is valued.

Laser Scanners

Offers the longest range scan of all the technologies. Far fewer moving parts than in older type lasers and some now come with a 5 year warranty! Scan from near contact to over a metre with certain models

Used in general retail and industrial applications (heavy duty models)

Presentation Scanners

Where a large number of bar code scans are performed, the presentation scanner, which emits laser scan lines which intersect at all angles, decodes the barcode whichever angle it is presented from

Good in high volume document handling environments and for large quantities

of retail scans 

2D Scanners - Area Imagers

Obviously essential if you're wanting to scan 2 dimensional codes! Will also scan linear codes from any angle - instantly

Being used increasingly in industrial applications where manufacturers are now using the 2D code on small components!

Will avoid RSI in operators due to there being no requirement to twist your wrist to scan the code!