Home security alarm systems can be divided into two types - the cable system and the wireless system. Both systems have advantages & disadvantages and a survey of the house would be required before deciding which system to install.
A basic alarm system would include sensors on all entry doors, sensors on windows that are easy to access.
A monitored alarm system is also advantageous - these systems are monitored by a specialist alarm company who will notify you when the alarm is triggered. some internal PIR sensors.
Call John Rogers (087) 7414362 - Dublin based Electrician