detectors

/D IH0 T EH1 K T ER0 Z/
noun
  1. 1

    A device capable of registering a specific substance or physical phenomenon, and that optionally sounds an alarm or triggers a warning.

    โ€œSmoke detectors are mandatory in public buildings.โ€

Source: https://en.wiktionary.org/wiki/detector, https://en.wiktionary.org/wiki/detectors