Basic Types of Intrusion Detection System

Different types of intrusion detection system may include cameras, sensors (detectors), locks, and communication equipment. Basically, we have two types of intrusion alarm available: Do-it-yourself security system and security systems by professional firms. Home security pundits warn that DIY alarms make you responsible for contacting the police or other emergency services in case of an accident. Professional security firms usually bear that responsibility themselves but in exchange for a monthly fee.

burglar system
‍Basic components of a burglar alarm system with sensors, an arm/disarm keypad, and a hidden central panel.

Nonetheless, manufacturers of DIY security systems offer complete security suites that feature window and door sensors, locks, motion and glass break detectors, sirens, and other vital components of a reliable for intrusion prevention system for your home or small office. A limited number of security firms also provide monitoring services that, in contrast to contracts by established companies, have no fixed term and do not bound you with a two- or three-year service contract.

There various types of intrusion detection systems:

Wireless vs. Hardwired Intrusion System

Hardwired home and office alarm systems are considered providing higher security level, as a whole. Nonetheless, latest wireless systems are as reliable as they cable-powered counterparts are while wireless technologies offer a growing number of advantages in the field of home and office security. You cannot tell which of those two alternatives is the best intrusion detection system without taking into account additional factors.

Monitored and Unmonitored Alarms

A monitored or unmonitored burglar alarm can be both hardwired or a wireless system. An unmonitored intrusion alarm usually activates a siren or another noisy device once a sensor within the security system has detected an intrusion. It is not quite suitable a solution for remote properties and real estate in rural areas, though.

‍‍Scheme of a complete alarm system protecting against intrusion and other disasters.

Monitored home alarm are connected to a third party while the sensors trigger both an alarm and send an alert to the monitoring party. Modern day security systems are able also to connect and alert you on any events on your smartphone or another mobile device. Obviously, this type of home and/or office security solutions is more expensive since you usually get 24/7/365 monitoring service for your property.

Dummy Intrusion Alarms

These are the cheapest intrusion protection tools but they work only as a sort of decoy. It is quite debatable whether a possible burglar will be stopped by such a visible dummy alarm and if a professional thief will ever be misguided to take it for a professional security system but it sometimes works.

Auto-dialing Security Systems

Security systems that feature an auto dialer are able to connect to a preset phone number or numbers in case of emergency. For example, you can have a pre-recorded voice message send to police, to a security firm of your choice, or to the local fire fighters. You can complement such a functionality with in-house motion sensors that detect whether there is someone inside the property and thus help the local security authorities assign a proper priority to the accident.


Points to Take Note

When choosing a security system you should look for a product that has the following options:

• A hidden control panel, with uninterrupted power source, which is connected to all other components, including a phone line.

• A security keypad arming and disarming.

• Passive infrared detectors (PIM) that use sensors to detect motion.

• Door and window magnetic sensors (switches) triggering alarm in case of a door or a window is open.

• Acoustic sensors detecting shock waves of glass breaking.

• Sirens mounted outside and/or outside the building

• A 24-hour back-up system that switches on if your phone line is cut off or your power supply is down.

• A smoke detector that connects to a third party.

You can also check this list of systems for your home or small office and select the best intrusion detection system.

Intrusion alters with Kisi
Example of intrusion alters with Kisi.


You can find a good number of reliable intrusion alarms on the market. They vary from professional suites that can cost in the range of a few hundred dollars a month to DIY systems where you pay some $20 - $30 a month for security monitoring while the security kit you install yourselves will cost you some $100 - $200.

A rule of thumb is to have a system in place which you can fully program and where you have access to all codes. Select a security system that is compatible with other security equipment and which can be connected to a variety of third-party services. Connecting your home or office alarm to the law enforcement agencies adds further layer of protection while a direct link to local fire station can help save your property in case of other emergencies. Here you can learn more about Kisi's intrusion alerts feature.