| Answer | Crossword Clue |
|---|---|
| SENSOR | Photoelectric eye |
| SCANNER | Photoelectric device |
| EYE | Photoelectric cell |
| SENSOR | Photoelectric cell |
| SENSORS | Photoelectric cells |
| CESIUM | Photoelectric cell component |
| CESIUM | Photoelectric cell element |
| SENSOR | Photoelectric cell, for example |
| CESIUM | Element in photoelectric cells |
| SENSOR | Photoelectric cell, e.g. |
| CESIUM | Element found in photoelectric cells |
| CESIUM | Element used in photoelectric cells |
| SELENIUM | Element used in photoelectric cells |
