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Plessey Code

UK Plessey Code is a continuous, variable length symbology used to encode hexadecimal data. Because it has a higher density than other common 2D symbologies such as Code 39 or Interleaved 2-of-5, it is most commonly used with dot matrix printers.

ClosedThe Character Set

This symbology is capable of encoding all hexadecimal digits, 0-9 and A-F.

ClosedThe Symbology Structure

Each digit in a UK Plessey Code symbol is encoded in 4 bars (or bits). Each wide bar followed by a narrow space represents a "1" bit; conversely, a "0" bit is encoded as a narrow bar followed by a wide space.

Each symbol appends two mandatory check digits to the end of the data.