Symbol Density/
Bar Code Type
Bar Code Content/ Contrast
Note 1
Typical Working Ranges
Near Far
5.0 mil
Code 39
ABCDEFGH
80% MRD
1.2 in
3.05 cm
12.5 in
31.75 cm
7.5 mil
Code 39
ABCDEF
80% MRD
1.1 in
2.79 cm
18.5 in
46.99 cm
10 mil
Code 128
1234
80% MRD
1.2 in
3.05 cm
Note 3
19.0 in
48.26 cm
13 mil
100% UPC
012345678905
80% MRD
1.6 in
4.06 cm
27.0 in
68.58 cm
15 mil
Code 128
1234
80% MRD
1.0 in
2.54 cm
Note 3
29.5 in
74.93 cm
20 mil
Code 39
123
80% MRD
1.4 in
3.56 cm
Note 3
52.0 in
132.08 cm
55 mil
Code 39
CD
80% MRD
31.4 in
8.64 cm
Note 3
100.0 in
254.0 cm
100 mil
Code 39
123456
80% MRD
2.0 ft
60.96 cm
Note 3
17 ft
518.16 cm
Note:
1 Contrast is measured as Mean Reflective Difference (MRD) at 650 nm.
2 Working range specifications at temperature = 23°C, pitch=18°, roll=0°, skew=0°, photographic qual-
ity, ambient light ~150 ft-c, humidity 45-70% RH.
3 Dependent upon width of bar code.
4 Distances measured from front edge of scan engine chassis.
SE4750-SR Decode Zone
The table below lists the typical distances for selected bar code densities. The minimum element width (or “symbol
density”) is the width in mils of the narrowest element (bar or space) in the symbol.
Technical Specifications | 173
MN000887A01-B | April 2015