calculator.org

the calculator home page

Colex ESR-70

The Colex ESR-70 is a scientific calculator with 8 digits precision and algebraic logic. It has 22 functions, 25 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAA.

Facts at a glance:

FeatureValue
TypeScientific
Functions22
Keys25
Precision8
LogicAlgebraic
Display typeVFD
Length152mm
Width95mm
Power Source4xAA
Year introduced1975

Replacements:

If you have a Colex ESR-70 that is no longer working, you can first try replacing the 4xAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current model as a replacement:

See other calculators by Colex