Microwave sensor

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last updated：Mar 06, 2026

PAL Inc.

Confused because they look similar!? Key points for selecting microwave sensors.

This time, we will clearly introduce our microwave sensors by application. We hope this will be helpful for those who want to know which sensor is best suited for their intended environment. BSS01 / BSM02 Microwave Intrusion Detection Sensor Covers a maximum range of 100 to 200 meters and is utilized for perimeter monitoring and large property boundaries. BSS201-P1 / BSM201-P1 Microwave Multi-Span Sensor Lightweight and easy to install, it is ideal for monitoring medium-sized areas such as around warehouses and along fences. BSS20 Microwave Smart Sensor Forms a "thick three-dimensional radio wave area" between the transmitter and receiver, and is highly regarded in critical infrastructure such as power plants and airports. BSS300 / BSS301 Microwave Short-Range Sensor Capable of wide-angle monitoring in close-range areas. It is suitable for space-saving environments such as around machinery, in front of entrances, and automatic doors. By leveraging the unique characteristics of each sensor, they can be used in a wide range of scenarios, from perimeter security to equipment safety management.

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Applications/Examples of results

Perimeter surveillance/safety monitoring of important facilities

Line up（5）

Model number	overview
BFS01	A safety monitoring sensor utilizing highly weather-resistant microwaves. Since it uses radio waves (microwaves), it is resistant to weather conditions such as rain, wind, snow, and fog, allowing for reliable measurements with fewer false detections even in harsh outdoor environments. It complies with the 24GHz band specific low-power radio station and the technical standards conformity certification (ARIB STD-T73), eliminating the need for cumbersome radio station license applications during use. Additionally, it can be used indoors and outdoors throughout the country.
BSS01 / BSM02	An intrusion monitoring sensor that is highly resistant to natural environments and capable of distance measurement. Unlike conventional Doppler and infrared interruption methods, it detects intrusions based on distance and reflection levels by adopting the FMCW method. This has reduced false alarms compared to traditional methods. It complies with the technical standards conformity certification (ARIB STD-T73) for 24GHz band specific low-power radio stations, eliminating the need for cumbersome radio station license applications during use. Additionally, it can be used both indoors and outdoors in Japan.
BSS20	Terrorism prevention measures for critical infrastructure such as power plants and airports: 3D radio wave barriers reliably catch terrorists. Microwave smart sensors are intrusion monitoring sensors that use radio waves in the 24GHz band. They detect intruders by blocking the detection area composed of multiple opposing transmitters and receivers. *Compliant with the technical standards certification for 24GHz band specified low-power radio stations (ARIB STD-T73).
BSS201-P1／BSM201-P1	Security measures for factories and equipment: catering to various needs from simple installations to permanent setups. The microwave multi-span sensor BSS201-P1 is an intrusion detection sensor that uses 24GHz band radio waves. It detects intruders by blocking the detection area formed by a pair of transmitters and receivers. *Complies with the technical standards for specified low-power radio stations in the 24GHz band (ARIB STD-T73).
BSS300 / BSS301	Security and safety measures in factories and facilities can accommodate various needs from simple installations to permanent setups. Microwave short-range sensors can monitor nearby areas with a wide angle. They are resilient to changes in the surrounding environment, such as weather, and achieve low false alarm rates for intrusion monitoring.