| Air-traffic detector |
| Apple activator |
| Ring tone activator |
| Aroma detector |
| Detector target |
| Detector activator |
| ___ detector (airport device) |
| Ignition activator |
| Jukebox activator |
| Aircraft detector system |
| Acidity detector |
| Appetite activator |
| Activator |
| Detector detection |
| Sound from a carbon monoxide detector |
| Cavity detector |
| Detector detection, ostensibly |
| Airport detector activator |
| Din detector |
| Smokey detector |
| Airport detector exciter |
| Airbag activator |
| ... and its detector |
| Actor activator |
| Smoke detector batteries, often |
| Type of detector |
| Remote activators? |
| Pinocchio's "lie detector |
| Carnival-ride activator |
| Common smoke detector |