Five Reasons Why Barcode Scanner Cannot Read Barcode

1. The function of reading this kind of barcode isn’t enabled.
2. The barcode doesn’t meet specifications. Such as lack of the necessary blank space, the contrast ratio of bar and space is too low, the width ratio of bar and space is inappropriate, etc.
3. The barcode scanner is under the direct sunlight, which makes the photosensitive device enter into saturation zone
4. A transparent material covered the barcode, which lead to high reflectivity. Although the barcode can be seen by eyes, it’s unable to be read by a collective device. Because the reading condition of collective device is very strict.
5. Barcode scanner hardware failure, it need to be maintained.