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.
East Grinstead is a town in West Sussex, England, near the East Sussex, Surrey, and Kent borders, 27 miles (43 km) south of London, 21 miles (34 km) northeast of Brighton, and 38 miles (61 km) northeast of the county town of Chichester. Situated in the extreme northeast of the county, the civil parish has an area of 2,443.45 hectares (6,037.9 acres). The population at the 2011 Census was 26,383.
Nearby towns include Crawley and Horley to the west, Tunbridge Wells to the east and Redhill and Reigate to the northwest. The town is contiguous with the village of Felbridge to the northwest. Until 1974 East Grinstead was in East Sussex, before joining together with Haywards Heath and Burgess Hill as the Mid-Sussex district of West Sussex.
The town is on the Greenwich Meridian. It has many historic buildings, and the Weald and Ashdown Forest lie to the south-east.