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 batteries.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Scientific |
| Functions | 22 |
| Keys | 25 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | VFD |
| Length | 152mm |
| Width | 95mm |
| Power Source | 4xAA batteries |
| Year introduced | 1975 |
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: