Types of Alarm Sensors:Alarm Sensors are essential elements of your home security system. A wide variety of security alarm sensors
and detectors are available for use. It is obvious what most sensors do, so we will only describe the main ones used in a basic system. Contact Sensors: Most burglaries involve doors, either on entry or while leaving the house. So protecting
all doors is a must. Example: magnetic circuit breakers. Door contacts may be hardwired or wireless; hardwired contacts are usually buried in the doorframe, which is less obvious than wireless and are preferable. Window Contacts: Can be hardwired or wireless. Motion Sensors: It’s the most essential and common form of protection. Passive infrared sensors: Detect motion by sensing a sudden change in heat. Dual Tech motion detectors use two different technologies in the same unit: passive infrared and microwave.
The Conceptual Significance of Public and Private SpacesOne of the worst consequences of the antagonism on the part of police toward private security forces is that the private security industry could actually provide valuable assistance to the overall interest of national, regional, and local security.
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Today private property requires protection in many industries such as banking, medical, chemical, technological, manufacturing, even retailers and small businesses need security protection.