The best replacement for detector is sensor.

The best alternatives to detector are rated as following:
★★★★★  sensor
★★★  laser jammer
★★★  smoke detector
★★★  jammer
★★★  detector
★★★  polygraph
★★  heat detector
★★  smoke alarm
★★  bug detector
★★  carbon monoxide detector
★★  ionization
★★  radar jammer
★★  photoelectric
★  gold detector
★  alarm
★  synchronous detection
★  scanner
★  metal detector
★  ionization smoke detector
★  valentine
★  phase frequency detector
  professional metal detector
  flame ionization detector
  image intensifier
  carbon monoxide
  sprinkler
  photoionization detector
  flame ionization
  clnd detector
  other bug detector
  propane detector
  locator
  transducer
  fire detector
  scrambler jammer
  peak detector

Your alternative for detector is not listed? Suggest!
Speaking about detector, one probably shouldn't forget about gps.

Other search terms related to detector and their ratings are:
★★★★★ gps
★★ sounder base
★ ic
★ pinpoint
You have in mind a companion for detector and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of detector in all years. Click on graph for more.
detector
sensor
laser jammer