In the example above, time of day plays a role, as does either a door unlocking or a motion detector being triggered.
Upon detecting any sound in the range of 10 120 kHz the detector was triggered to relay the previous 3.4 seconds of recorded sound with time expanded by a factor of ten, via Sonobat Autorecorder Software DND Designss) onto an onboard laptop computer sound card (Sigma Tel C-Major Audio).
Once these detectors are triggered, people would go to their medical department for further evaluation and treatment.
The alarm was raised when two CO2 detectors were triggered at 11 25 GMT on Saturday at the French end of the north tunnel.
Scintillation counter, radiation detector that is triggered by a flash of light (or scintillation) produced when ionizing radiation traverses certain solid or liquid substances (phosphors), among which are thallium-activated sodium iodide, zinc sulfide, and organic compounds such as anthracene incorporated into solid plastics or liquid solvents.
When a pulse is triggered, detectors in the sensors search the reflected echo, whereas the microcontroller board keeps a track of time lag.
If smoke detectors are connected to the home alarm system, your monitoring service will be notified if a smoke alarm is triggered.
Invented by one of the creators of Apple's iPod, Nest Protect combines a traditional smoke alarm, which is triggered when it detects the poor visibility caused by smoke, with a host of other sensors including heat, light, activity and ultrasonic detectors and a detector for deadly carbon monoxide gas.
This is because the motion detector can be triggered by any moving object, a person, a pet or even window drapes swaying in a breeze.
Make sure your metal detector will be triggered by the material you want to find.
