5 Intrusion Detection System Examples & Types (2024)

An intrusion detection system (IDS) is vital for protecting physical spaces from unauthorized access and potential threats. These systems detect suspicious activity and alert security teams to respond promptly. 

In this blog, we will explore five examples of physical intrusion detection systems that help safeguard properties and ensure security.

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5 Examples of Intrusion Detection Systems

Video Surveillance

1. Video Surveillance

Video surveillance systems are a cornerstone of modern security solutions. These systems utilize cameras to monitor and record activities in and around a property.

They provide real-time footage and can be integrated with other various intrusion detection and prevention systems for comprehensive protection. Video surveillance is effective in deterring intruders and providing evidence in case of security breaches.

2. Motion Sensors

Motion sensors detect movement within a designated area. The system triggers an alert when motion is detected, notifying security personnel of potential intrusions. 

Motion sensors can be used indoors and outdoors and are often part of a larger security detection system. Motion sensors are crucial for detecting unauthorized entry and ensuring timely responses to security threats.

3. Doorstops

A doorstop is a simple yet effective intrusion detection and prevention system. It is placed at the base of doors and triggers an alarm when the door is opened. 

Doorstops can prevent unauthorized access and alert occupants or security teams to potential intrusions. They are particularly useful for securing entry points and providing an additional layer of security.

4. Glass Break Sensors

Glass break sensors are designed to detect the sound of breaking glass. When a window or glass door is shattered, the sensor triggers an alarm, alerting security personnel to the intrusion.

Glass break sensors are essential for protecting properties with large windows or glass entry points. They ensure that any attempts to breach the perimeter are quickly identified.

5. Alarms

Alarms are a fundamental component of intrusion detection systems. They provide audible or silent alerts when unauthorized access is detected.

Alarms can be integrated with various sensors and security systems to provide comprehensive protection. Audible alarms can deter intruders by drawing attention to the breach, while silent alarms can notify security personnel without alerting the intruder.

Main Components of PIDS

Perimeter Security Sensors

Thermal Cameras

Thermal cameras are a crucial component of Perimeter Intrusion Detection Systems (PIDS). They detect heat signatures of intruders, allowing security personnel to see in complete darkness or through environmental obstacles like fog and smoke. 

Thermal cameras provide clear images based on temperature differences, making them highly effective for night surveillance and in areas with low visibility.

Physical Barriers

Physical barriers are the first line of defense in PIDS. These include fences, walls, and gates designed to prevent unauthorized access.

Physical barriers delay intruders, giving security teams more time to respond. They can be enhanced with additional security measures, like barbed wire or electric fencing, to increase their effectiveness.

Alarm Verification

Alarm verification is essential to reduce false positives and promptly address genuine threats. This component involves using video surveillance or other detection methods to confirm the cause of an alarm. 

Verified alarms enable security teams to respond accurately and efficiently, avoiding unnecessary disruptions.

Automatic Lockdown

Automatic lockdown systems enhance the security of property by immediately securing all entry points when an intrusion is detected. This feature is crucial in preventing intruders from moving further into the premises. 

Automatic lockdown systems can be integrated with access control and alarm systems to provide a comprehensive security response.

Real-Time Alerts

Real-time alerts are vital for prompt incident response. When an intrusion is detected, the system sends immediate notifications to security personnel via various channels, such as text messages, emails, or push notifications.

Real-time alerts ensure that security teams can quickly assess and respond to potential threats, minimizing the risk of damage or theft.

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What are the Benefits of a Physical IDS?

  • Enhanced Security Measures: Physical intrusion detection systems (IDS) provide robust security measures by detecting and preventing unauthorized access to a property.
  • Early Detection of Malicious Activity: These systems are designed to detect suspicious activity early, allowing for prompt response and minimizing potential damage.
  • Reduction of False Positives: Advanced detection methods, such as anomaly detection and hybrid intrusion detection systems, help reduce the occurrence of false positives, ensuring that genuine threats are addressed.
  • Improved Incident Response: Real-time alerts and automatic lockdown features enhance incident response capabilities, ensuring that security teams can act quickly to prevent further intrusion.
  • Regulatory Compliance: Physical IDS can help organizations meet regulatory compliance requirements by providing documented evidence of security measures and incident responses.
  • Prevention of Future Attacks: By effectively detecting and responding to security incidents, physical IDS can prevent future attacks and enhance the overall security posture.
  • Minimization of Security Risks: Implementing a comprehensive IDS solution helps minimize security risks and protects assets from potential threats.
  • Effective Event Management: IDS solutions facilitate event management by monitoring and logging security incidents, which can be analyzed to improve future security measures.
  • Protection Against Unknown Attacks: Anomaly detection and other advanced detection methods enable IDS to identify and respond to unknown attacks, providing a higher level of security.
  • Reduction of Security Incidents: By continuously monitoring and detecting suspicious activity, IDS can significantly reduce the number of security incidents and breaches.

Factors To Consider When Choosing an IDS

Perimeter Intrusion Detection System

Type of PIDS

When selecting a Perimeter Intrusion Detection System (PIDS), consider the type that best suits your security needs. Options include fiber optic sensors, infrared sensors, microwave sensors, and seismic sensors.

Each type offers different advantages and is suitable for various applications and environments. Evaluating the strengths and weaknesses of each PIDS type can help determine the most effective solution for your property.

Easy Integration

An effective IDS should easily integrate with your existing security infrastructure. It includes compatibility with surveillance systems, access control systems, and alarm systems. 

Seamless integration ensures that all components work together to provide comprehensive security coverage. IDS solutions that support standard protocols and interfaces are generally easier to integrate and manage.


Reliability is a crucial factor in choosing an IDS. The system should consistently detect and respond to intrusions without frequent false positives or missed detections.

Consider systems with a proven track record of reliability and are known for their accurate intrusion detection and prevention methods. Regular maintenance and updates can also enhance the reliability of the IDS.


The cost of an IDS includes the initial purchase price, installation fees, and ongoing maintenance costs. Evaluate the total cost of ownership and ensure it fits within your budget.

While advanced systems with multiple features may be more expensive, they often provide better security and long-term value. Consider the balance between cost and the level of security provided.

Maintenance & Support

Regular maintenance and reliable support are essential for the continued effectiveness of an IDS. Choose a system that offers comprehensive maintenance plans and readily available technical support.

Strong support and maintenance ensures that issues can be promptly addressed, minimizing downtime and maintaining optimal security. Additionally, consider the availability of updates and upgrades to keep the system current with evolving security threats.


What is an example of physical security?

A video surveillance system is an example of physical and security measures. It includes CCTV cameras placed strategically around a property to monitor activities and deter unauthorized access. Other examples include security fences, gates, motion detectors, and alarm systems. These measures protect assets, personnel, and property from physical threats and intrusions.

What is physical intrusion in cyber security?

Physical intrusion in cyber security refers to unauthorized access to physical components of a network, such as servers, routers, or workstations. This intrusion can lead to data theft, network disruptions, and other malicious activities. Physical security measures, such as locked server rooms and access control systems, are essential to prevent these intrusions and protect the integrity of the network.

What is an intrusion detection system in physical security?

An intrusion detection system (IDS) in physical security is a system designed to detect unauthorized access or activities within a protected area. Examples include motion sensors, glass break sensors, and thermal cameras. These intrusion detection systems monitor for signs of intrusion and alert security personnel to respond, thereby preventing potential security breaches and protecting assets.

Key Takeaways

Physical intrusion detection systems (IDS) safeguard properties against unauthorized access and potential threats. They use various technologies, such as thermal cameras, motion sensors, and alarm systems, to effectively detect and respond to intrusions. 

Choosing the right IDS involves considering factors like type, integration, reliability, cost, and maintenance. Implementing a robust IDS enhances security and provides peace of mind.

Ensure your property is protected with advanced and reliable security solutions. Contact us today for a free consultation and find the best intrusion detection and prevention system for your needs.

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