The S660 counter series consists of five models: S660, S661, S662, S663, and the S664. All can accept a variety of input types and can handle a broad range of your roughest industrial applications.
S660 Series Counters from Simpson Electric
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S660 Totalizer/Counter
Totalizer with several operating modes: count direction, add/add, add/subtract, subtract/subtract 6 Digit 0.56" (14.2 mm) bright red LED display Count speed up to 20 KHz
Totalizer with several operating modes: count direction, add/add, add/subtract, subtract/subtract 
