An Overview Of The Most Important Intrusion Detection Systems

In the present times, we are surrounded by various risks and threats that are difficult to detect and control with the help of traditional systems. As such, new and modern intrusion detection systems are emerging that are playing a great role in neutralizing different kinds of threats. The new smart tools are augmenting the intrusion detection systems and providing an additional layer of defense cover to security services.

Some of the most important devices that are augmenting the intrusion detection systems include infrared systems, CCTV installations, sensors, and other types of smart alarms.

Let us examine these in detail.

CCTV Surveillance 

The CCTV surveillance mechanism has been in use for a long time now. This surveillance mechanism is especially suitable for crowded places like railway platforms, metro stations, and other public places. CCTV surveillance is also an important part of security mechanisms in financial institutions, the corporate sector, and other sectors of public importance. CCTV installations are the most cost-effective and robust form of surveillance as they keep a record of various activities that help in the investigation process.

Infrared Systems

The most advanced intrusion detection systems that are currently in use are infrared barriers. Infrared barriers are usually suitable for those establishments that cover a relatively large area. The maximum range of infrared detection systems is 150 meters after which its accuracy goes on decreasing. A transmitter column and a receiver column are kept in a line of sight within a distance of 150 m. A modulated beam signal is released by the transmitter and detected by photodetectors of the receiver. In this way, an invisible but effective surveillance mechanism is set up and a high level of protection is provided. However, the disadvantage associated with this type of surveillance mechanism is that it often raises false alarms in case of rains, lightning and its efficacy decreases when fog and mist become heavy.


Sensors are another important component of surveillance mechanisms in intrusion detection systems. They may be used as a stand-alone device or in consonance with other installations. They are mostly used in high-risk areas that are prone to theft and attacks. The two most common places where sensors are used include financial treasuries and critical military installations. However, censors also find use in various public and private establishments that are located in risk prone areas.

Sensors are usually classified into two main types. The first is called a motion sensor whereas the second is called a pressure sensor. Motion sensors usually detect the side movement of a person or an object within a particular range. On the other hand, pressure sensors are usually installed on the floor and detect the moment of a person when he steps on the boundary guarded by that sensor.


Alarms are also an important component of intrusion detection systems. Alarms are of numerous types ranging from mechanical alarms to digital alarms. We are also seeing some of the smart alarms that are coming up and attracting the interest of security agencies. Alarms can also be classified on the basis of the purpose for which they are designed. Accordingly, we have a fire detection alarm that is fitted with smoke sensors and raises an alarm upon detection of smoke. Certain establishments also have thermal alarms that are fitted with temperature sensors. They raise an alarm when the temperature exceeds a certain threshold. In addition to this, we also have some multi-purpose smart alarms that are used for various purposes. Smart alarms can be remotely controlled over the internet and can be used for monitoring movement, sound, fire, and the like.

Identification Systems 

Various types of identification systems are augmenting our intrusion detection systems. In fact, the identification systems are important for any intrusion detection system to function in its full capacity. The identification systems regulate entry and exit points with the help of various mechanisms. For instance, fingerprint verification systems and geometry verification systems may be used at entry and exit points to check unauthorized access. Face identification systems are also used at certain check points. In addition to this, we may also use the iris comparison system and speech verification system. In some of the most sensitive places, we install such systems that have an aggregate of above capacities and provide a high level of intrusion detection.

The Way Ahead

Intrusion detection systems are being augmented with the help of state-of-art technologies conceived through artificial intelligence. The modern intrusion detection systems are able to analyze data, record it, and use it for further processing and improved surveillance.