Whatever the sensor is designed to detect.
Modern-day alarms are wonderfully effective at fending off intruder either by using motion detecting lights or audible alarms to rapidly alert the property owner. Most alarms can also be connected with the local police department.
Photoelectric smoke alarms are also called optical alarms. They are more expensive than regular alarms. They are also more accurate and less likely to go off unnecessarily.
Smoke alarms may go off simultaneously if there is a widespread presence of smoke or fire in the area where the alarms are installed. This can trigger all the alarms to sound at once to alert people of the potential danger and prompt them to evacuate the premises.
Generally, no.
No
Smoke alarms may go off simultaneously due to a common trigger, such as smoke or fire in the vicinity. This can activate interconnected alarms in a building to alert occupants of potential danger.
No, because store alarms are not metal detectors.
No, because store alarms are not metal detectors.
I have never come across a brand of car alarms that does not offer a model that talks when it is set off. The most highly recommended brands of car alarms that talk are Clifford Car Alarms, Viper Car Alarms, and Commando Car Alarms. A GSM car alarm, with a GSM car alarm you can talk to the thief and notify them that you're going to cut off the fuel supply.
Yes, metal zippers on clothing can sometimes set off airport security alarms due to the metal content.
dogs howl outside because of alarms going off or cop alarms go off it hurts there ears so then they will start to howl or they will howl with nuther dogs
Car alarms are most often triggered by accident. Depending on the sensitivity of the car alarm and if it includes an optional sensors, a pet or wild animal could set off an alarm. Sometimes even bugs can set off car alarms.