Barcode Reader Selection Points [Price]
The price of a code reader largely depends on the four points introduced here.
- Supported cell size / narrow bar width
- Ability to handle difficult-to-read codes
- Reading field of view
- Reading distance/depth
Supported cell size / narrow bar width
The smaller the cell size of the QR code or DataMatrix code, or the more narrow the narrow bar width, the harder a code is to read. The increased number of components subject to traceability has resulted in a greater need for reading extremely small codes on increasingly smaller components.
Ability to handle difficult-to-read codes
Codes marked directly on components made of resin, metal, and other materials (referred to as DPM, or direct part marking) are often characterized by a low black and white contrast, and are easily affected by glare due to the reflectance of the material itself. This makes the codes more difficult to read. This means that users must select the best code reader and reading settings for their specific conditions. The graph below shows how the price of a code reader is affected by its ability to handle difficult-to-read codes, which vary by marking method and complexity.
Reading field of view
Code readers with a wide reading field of view can ensure greater operational efficiency. For example, the ability to read multiple codes at once and to omit setup changes (such as positioning) for each product type can significantly improve productivity.
Reading distance/depth
A code reader capable of reading data over long distances ensures a greater degree of freedom when designing new equipment or retrofitting existing equipment by offering greater flexibility in terms of installation conditions. In addition, a code reader with an increased reading depth can handle various product types even if the reading distance changes, such as in production lines with multiple product types.
