Intruder alarms detect attempted intrusion or unauthorised entry into a building, room, site or secure installation and trigger a response. Well-fitted and maintained intruder alarms can make organisations and individuals less likely to become victims of burglary, vandalism and other forms of attack.
There are many different types of intruder alarms, with selection depending on personal preference, location, building size, level of protection required, monitoring, method of response and so on.
Intruder alarms can be wired or wireless. Generally wireless alarms are easier to install. Installing wired alarms can be disruptive and even domestic installations will generally need to be fitted by a professional.