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Intruder Alarm
A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school. Security alarms protect against burglary (theft) or property damage, as well as against intruders. Examples include personal systems, neighborhood security alerts, car alarms, and prison alarms.
Some alarm systems serve a single purpose of burglary protection; combination systems provide fire and intrusion protection. Intrusion-alarm systems are combined with closed-circuit television surveillance (CCTV) systems to record intruders' activities and interface to access control systems for electrically locked doors. There are many types of security systems. Homeowners typically have small, self-contained noisemakers. These devices can also be complicated, multirole systems with computer monitoring and control. It may even include a two-way voice which allows communication between the panel and monitoring station.
Hemel Hempstead (/ˈhɛməl ˈhɛmpstɪd/) is a town in the Dacorum district in Hertfordshire, England. It is 24 miles (39 km) northwest of London, and is part of the Greater London Urban Area. The population at the 2011 census was 97,500.[1]
Developed after the Second World War as a new town, it has existed since the 8th century and was granted its town charter by Henry VIII in 1539. Nearby towns are Watford, St Albans and Berkhamsted.
