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Adler 81C (EC23B)

The Adler 81C is an arithmetic calculator with 8 digits precision and algebraic logic. It has 6 functions, 24 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAAA.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions6
Keys24
Precision8
LogicAlgebraic
Display typeVFD
Length120mm
Width75mm
Thickness20mm
Weight134g
Power Source4xAAA
Year introduced1975
Year discontinued1975

Replacements:

If you have an Adler 81C that is no longer working, you can first try replacing the 4xAAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements:

See other calculators by Adler