Sunday 20 November 2016

Barcode Scanners

Barcode Scanners

Barcode scanners have become easier to use and install than ever before.

There are a few things you will need to consider before deciding which scanner is suitable for your application.

  • What environment will the scanner be used?
  • Is it in a rugged environment such as a warehouse?
  • How often will it be used?
  • What kind of barcodes will you be reading?
  • Can you stay connected to a PC?

Knowing how you'll be using the scanner will help you decide what scanner typeform factor, and other options you'll need. Understanding each of these factors will help you find the right scanner for your needs.

Barcode Scanner Types


The most important concerns when choosing a suitable scanner is the type of scan engine it has. This is ultimately dependent on the type of barcodes that you will be reading and how aggressive of a unit you'll need. 

There are 3 main types of scan engines:
Laser
This is the most well known scanner type. It uses a red diode laser to read the reflectance of the black and white spaces in a barcode. Laser scanners are only able to read standard linear (1D) barcodes but are also the most cost effective option. Standard laser scanners can read from a few inches to a foot or two away depending on the size of the barcode. 

Linear Imager
Linear imager scanners are similar to lasers in that they also only read 1D barcodes. But instead of reading reflected light from the laser, they take a picture of the barcode. It then analyzes this image to extract the information from the code. Linear imagers, like the Honeywell Voyager 1450G, have become a very good replacement for laser scanner as their read ranges and costs have become similar. A linear imager also does a better job reading poorly printed or damaged codes compared to lasers. For applications that need a more aggressive scanner, a linear imager would be a great fit for the same cost.

2D Area Imagers
Like linear imagers, full 2D imagers also capture an image to analyze. But compared to the linear only devices, these scanners can read any type of barcode. 1D, stacked, and 2D barcodes are all supported by a 2D imager. Another advantage these imagers have is that the orientation of the barcode isn't important when reading. With lasers and linear imagers, you have to line up the indicator horizontally across the barcode. A 2D imager is taking a more detailed image and is more intelligent, so you can read a code in any direction. This results in faster reads with less aiming. 2D imagers, like the HONEYWELL 1452G, can also read barcodes off of any surface including a monitor or phone screen. With their added abilities and very aggressive reading, 2D imagers are becoming more popular in all industries to speed up scanning applications and expand the ways in which barcodes are used.


Other Factors you need to consider











Once you know what type of scanner you'll need, the next big question is what form factor the scanner will be. Most of us are familiar with the basic gun-style and in-counter scanners from retail and grocery stores. There are 2 factors for scanners, and each has advantages depending on your application and how you'll use the scanner.


Handheld
These are by far the most common form that scanners come in and are very easy to operate. Simply aim the scanner at the barcode and pull the trigger. Most models, like the Zebra LS2208, will also offer a stand for hands-free operation. Handheld scanners are also available in cordless form to avoid cable clutter and increase your mobility. 
Hand Held Barcode Scanners

Presentation
Presentation scanners, like the HONEYWELL GENESIS MS7580, are designed to sit on a counter-top and don't need to be picked-up or held. These scanners are made for hands-free scanning and will not require triggering to read. Likewise, instead of a single aimer like handheld scanners, presentation scanners have wide reading areas to reduce the need for aiming. You'll find these types of scanners at retail check-outs since it is easy to scan many items quickly. Just present the barcode in front of the scanner and it will read it automatically. 
Presentation Barcode Scanners



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