Security Systems should cover all doors and windows that open. Security Systems also known as Alarm Systems or Burglar Alarms are electronic alarms designed to alert the user to a specific danger. Sensors are connected to a control unit via low-voltage wiring or a narrowband RF signal which is used to interact with a response device. The most common security sensors are used to indicate the opening of a door or window or detect motion via passive infrared (PIR). New construction systems are predominately hardwired for economy. Retrofit installations often use wireless systems allowing for protection of all doors and windows that open. Systems range from small, self-contained noisemakers, to complicated, multi-zoned systems with color-coded computer monitor outputs. Burglar alarms are sometimes referred to as alarm systems.
Security Systems, Alarm Systems or Burglar Alarms are divided to two main fields: home burglar alarms and industrial burglar and perimeter intrusion detection.