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The performance of a barcode scanner mainly depends on depth of field, width, speed, resolution, decoding capability, scanning angle, etc. Many non-professionals may not know much about these parameters. If you make a choice, you can refer to the explanation of the parameters below, so that you can compare them when choosing.

1.Depth of field

This refers to the effective working range of the barcode scanner, which is the difference between the farthest distance the scan head is allowed to leave the barcode surface and the closest point the scanner can approach the barcode surface. If the product details do not indicate the depth of field, the scanning distance can also be used as a reference.

2.Width

This is the physical length value of the barcode information that can be read by the scanning beam at a certain scanning distance.

3.Speed

The scanning frequency of the scanning beam on the scanning trajectory per unit time.

4.Resolution

Resolution refers to the width of the narrowest barcode symbol successfully scanned. The unit is mil, which is usually divided into 5mil, 4mil and 3mil. Under the same conditions, the depth of field increases and the resolution will be greatly reduced. If the resolution is too high, stains, deinking, etc. on the strips will have an impact on the scanner.

5.Decoding ability

This means that the scanning gun does not support 1D codes, 2D codes, stacked codes, etc. In principle, the more types of codes supported, the stronger the decoding capability.

6.Scan angle

The maximum inclination of scanning allowed by the scanner requires the user to use the scanner within a certain angle. First-time recognition rate: This refers to the ratio of the number of tags read in the first scan to the total number of scanned tags. However, this indicator is only suitable for handheld light pen scanning recognition methods.

7.Bit error rate

This indicator is more important than the first recognition rate, which is the ratio of the number of false recognitions to the total number of recognitions.