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Adler 81 (EC11)

Adler 81
Image: Joe Haupt, CC BY-SA 2.0

The Adler 81 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 20 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is 3xAA. The calculator was manufactured in England;Germany. Note: Rebadged Anita 811 or Triumph 81

Facts at a glance:

FeatureValue
TypeArithmetic
Functions5
Keys20
Precision8
LogicAlgebraic
Display typeLED
Length119mm
Width68mm
Thickness24mm
Weight140g
Power Source3xAA
CountryEngland;Germany
Original price$170
Year introduced1973
Year discontinued1974

Replacements:

If you have an Adler 81 that is no longer working, you can first try replacing the 3xAA 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