PIDS - Perimeter Intrusion Detection System

This is a highly effective monitoring system that supports security operators in making accurate and prompt decisions and responses.
PIDS is widely used in critical facilities such as data centers, energy infrastructure, airports, and prisons, as well as in factories and warehouses.

Security by PIDS with combined security guards, sensors and surveillance cameras enables the following immediate response in real time in the event of an intrusion:

There are various types of sensor technologies used in PIDS, and the optimal choice depends on factors such as installation location, coverage area, and required detection accuracy.

• Outdoor Environmental Resistance
  Since PIDS is primarily used outdoors, minimizing nuisance alarms caused by environmental noise — such as rain, wind, moving vegetation, ground movement, nearby traffic, and sunlight—is a critical technical challenge. Therefore, features like IP rating (dust and water resistance) and overall environmental durability are essential.
• Coverage of Large-Scale Sites
  For facilities with extensive perimeters such as industrial facilities, airports, or energy infrastructure, the sensor technology must be capable of covering long distances efficiently. This requires scalable systems that maintain high detection accuracy across wide areas, often with minimal infrastructure and maintenance.
• Compatibility with Existing Security Systems
  To maximize operational efficiency, PIDS should seamlessly integrate with existing security infrastructure such as CCTV, access control, and alarm systems. Compatibility enables centralized monitoring, coordinated response, and enhanced situational awareness for security personnel.

There are several types of perimeter detection sensors, each differing in detection targets—such as motion, heat, sound, or pressure—and installation methods. Selecting the appropriate sensor depends on the specific conditions and requirements of the installation site.

This page introduces three representative sensor technologies commonly used in PIDS: fiber optic sensors, LiDAR sensors, and photobeam (infrared beam) sensors.

• Accurately detects suspicious vibrations and displacements when installed along perimeter fences or mesh barriers
• Available in both zone-based and point-based detection models
• Equipped with advanced algorithms to minimize nuisance alarms
• High environmental durability (dustproof and waterproof IP rating), suitable for Southeast Asia’s hot, humid, and rainy climate conditions

• Prisons and detention facilities
• Power plants, substations, and other energy infrastructure
• Government and military-related facilities
• Data centers

For more detailed information about fiber optic sensors, please refer to Fiber Optic Sensor / Copper Sensor Product List.

OPTEX SL (Smart Line) series is a long-range photoelectric detector using active IR technology. It’s optimally developed for perimeter intrusion detection applications. It’s designed for outdoor environments and offers high stability against nuisance alarms caused by rain, fog, or small animals. Multiple beam models are available to enhance detection accuracy and reduce nuisance alarms.
SL-200QDM/SL-350QDM/SL-650QDM are the advanced models of SL series. Double-modulated quad beams and A.T.P.C (Automatic Transmit Power Control), which is OPTEX’s unique function, can reduce both nuisance alarms and missed alarms. LED indicators, sound assist, and upper/lower beam selection buttons support your optical axis alignment and reduce the workload during installation and setup.

For an explanation of how photobeam sensors work and how to choose the best model based on your environment and needs, please refer to the article at A Comprehensive Guide to Photobeam Sensors for Perimeter Security.

• Selectable installation method：Fence, Wall and Pole
• Supports long-range detection (models available up to 200 meters)
• Technology and functions to minimize nuisance alarms caused by outdoor environmental factors (weather, sunlight), small animals and birds.
• Easy optical axis alignment structure reduces installation time.
• High-sensitivity design for stable detection even under harsh weather conditions.
• Immediate notification of detection performance degradation due to fog, heavy rain, or other severe weather (trouble signal output via DQ circuit)

• Factories and Warehouses
• Commercial facilities
• Residentials
• Airports

For more detailed information about Photobeam sensors, please refer to Photobeam Sensor Product List.

• Selectable installation method：Wall, Ceiling and Pole
• REDSCAN Pro and REDSCAN mini-Pro models, the size and sensitivity of the target object can be individually customized for each detection zone. (8 independent detection zones)
• Suitable for rooftop protection, detecting a crawling person near fences and running individuals.
• Outdoor models: Designed for outdoor installation with dustproof and waterproof specifications (IP rating).
• Small Animal Tolerance and Environmental Resistance Function: the algorithm provides strong resistance to environmental noise such as weather conditions, nearby traffic, and moving vegetation.
• REDSCAN Pro and REDSCAN mini-Pro models are compliant with ONVIF Profile S.

• Infrastructure facilities
• Airports
• Factories and Warehouses
• Commercial facilities
• Data centers

For more detailed information about LiDAR sensors, please refer to LiDAR Sensor Product List.

OPTEX’s sensors for Perimeter Intrusion Detection Systems (PIDS) have a strong track record in proposals for tender projects and large-scale installations all over the world.
In Southeast Asia, they have been deployed in a wide range of facilities — from critical infrastructure sites such as energy facilities, prisons, data centers, and airports, to factories, warehouses, retail stores, and residential properties.
OPTEX provides tailored technologies and operational expertise for each site to ensure optimal performance.
You can find detailed examples of PIDS installations and applications on the case study page.