| Air-traffic detector |
| Aroma detector |
| Acidity-testing strip |
| Detector target |
| Abdominal acidity |
| Acidity, in medicine |
| Detector activator |
| ___ detector (airport device) |
| Counters acidity |
| Aircraft detector system |
| Acidity detector |
| Detector detection |
| Sound from a carbon monoxide detector |
| Cavity detector |
| Detector detection, ostensibly |
| Airport detector activator |
| Din detector |
| Smokey detector |
| Airport detector exciter |
| Acidity tester |
| Acidity. |
| ... and its detector |
| Smoke detector batteries, often |
| Type of detector |
| Acidity after gluttony |
| Acidity, to an M.D. |
| Pinocchio's "lie detector |
| Acidity paper |
| Common smoke detector |
| Smoke detector, e.g. |