An alarm system is intended to detect a burglary and will not necessarily prevent one.  Losses and damages may be reduced due to a quick response, usually by the police, provided the alarm is triggered.

An alarm system should never replace good physical security, such as deadbolt locks, adequate lighting, secure basement windows, and strong exterior doors.

Selecting an alarm company is just as important as the type and style of equipment used.  To help you select a company, ask for recommendations from friends with alarm systems, or your insurance agent.

Find out the age of the company, and the number of service facilities with local offices.  The company should possess adequate liability insurance and its employees should be bonded.  A written contract should be supplied and include equipment and service warranties.  The contract should also contain a service agreement to insure that the equipment retain a high level of operation.

1.  Ultrasonic Detectors

An ultrasonic unit generates a pattern of high frequency sound waves, which are generally inaudible.  When motion disturbs the sound pattern, the resulting change in frequency actuates the system causing an alarm to be transmitted.
The effective protected area usually extends up to 30 feet in front of the device, but will not penetrate walls or windows.  One or more units can be installed in a given area if required.
Some models are subject to false alarms from such simple movements as curtains blowing, or noises from homes or thunderstorms.  Improved models however, can discriminate against random movement or transient noises resulting in fewer false alarms.

2.  Microwave Detectors

This type of detector uses a high frequency radio-wave to transmit a wave length.  When it is disturbed by movement through the pattern, an alarm is initiated.
The range of this system is difficult to contain, since the wave pattern will penetrate most surfaces (glass, interior walls, etc.) and will tend to cause false alarms.  Due to these problems, it is not recommended for residential security.

3.  Infrared Detectors

The human body releases heat to the surrounding atmosphere that may be detected by infrared equipment.  This is the principle for this type of space protection; it detects the presence, in the protected area, of the human being.
This is an ideal area detector under ideal conditions, however many environmental factors, such as intense heat, direct sunlight and appliance interference can adversely affect its performance.

4.  Photo Electric Beam

Photo electric devices transmit and receive an invisible light beam across a protected area.  Shoulod an intruder interrupt this beam, the alarm is activated.

5.  Magnetic Contact Switches

These are magnetically operated switches, which are generally affixed to moveable doors and windows.  When the door or window is opened, the switch's magnetic field is broken, causing the contacts to close and create an alarm condition.
These devices are relatively maintenance free, and come in surface or flush mounted models

6.  Pressure Mats

A device installed under carpets which detects weight.   Suitable for areas requiring specialized protection, such as an entrance to a bedroom or in front of a wall safe.

7.  Control Panel

Generally located near the front door of a residence, the control panel is used to activate the alarm system.  Panels can be either key or push button operated, and provide a time period to allow you to enter or exit the building without activating the alarm.

8.  Emergency/Panic Buttons

A portable or wall-mounted device designed to manually activate an alarm system in an emergency.  An emergency is anything that is of immediate danger to you or your property.

Police respond to all alarms.  False alarms waste manpower and reduce the integrity of the system.  Since most false alarms are caused by home owners, the responsibility is placed on them to ensure correct operation.

Therefore, the police encourage installation of adequate and properly maintained systems.  Arrangements for response by the alarm company, a relative or a neighbour is necessary to permit entry to conduct a check of the premises.   Police Crime Prevention Branches are often able to assist you with your security program.

A local alarm sounds a bell/siren at the premises and is intended to frighten the intruder away and to alert occupants and neighbours.

A voice dialer uses the household telephone line to transmit a tape-recorded message in the event of a burglary.  Some police forces restrict the use of voice dialers.

A remote alarm is transmitted by telephone line to an alarm company where systems are monitored 24 hours a day.  The alarm company notifies police and may dispatch their own personnel.

The U.L.C. sets minimum requirements for equipment, and where applicable, sets standards for installation and maintenance.  An alarm company may contain components approved by the U.L.C., however, due to the installation, the system might not meet the U.L.C. standard.

  
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