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Decode Zone
The Decode Zone chart below illustrates the working
range of the scanner, i.e., the range of distance from a bar
code in which a bar code can be successfully decoded.
This range varies with bar code density, which is
determined by the width of the narrowest element (bar or
space). This narrowest element is measured in mils,
indicated over the arrows measuring each decode range.
Note: Typical performance at 68°F (20°C) on high quality
symbols
Scanner
0
2
0
Depth of field as a function of minimum element width
R e f e r e n c e
7.5 Mil
15 Mil
20 Mil
40 Mil
8
10
12
4
6
12.7
25.4
55 Mil
14
16 18
20
22
38.1
50.8
7
10
25.4
5
12.7
0
5
12.7
25.4
10
In. Cm.
26 In.
24
63.5
Cm.
0
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