A security alarm[1] is a system designed to detect intrusion – unauthorized entry – into a building or area. Security alarms are used in residential, commercial, industrial, and military properties for protection against burglary (theft) or...
Key Features : A fire alarm is a sounder. The sounders make a siren or a similar noise to let people know that there is a fire. Some companies that make fire alarms are Wheelock and Simplex. Sometimes, old-fashioned fire alarms are metal bells. An...
A fire alarm system warns people when smoke, fire, carbon monoxide or other fire-related emergencies are detected. These alarms may be activated automatically from smoke detectors, and heat detectors or may also be activated via manual fire alarm...
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