SDS Perimeter uses multi-mode detection, requiring both an acoustic signal (muzzle blast) and an infrared thermal signature (muzzle flash) before triggering an alert. This dual-physical-signal approach filters out common false alarm sources like construction noise and vehicle backfires, achieving fewer than 1 false alarm per 1 million hours of sensor use under normal operating conditions.

Each sensor covers a minimum of 15,700 square feet across a 180-degree field of view, with a standard detection range of 100 feet. Coverage represents an aggregate of all calibers and shooter positions – detection range and performance may vary for specific firearms, including low-caliber handguns. Extended coverage up to 150 feet — including detection of incoming fire beyond the 100-foot standard range — provides approximately 35,340 square feet of coverage per sensor. For larger environments, multiple sensors can be networked together for seamless, scalable coverage across campuses, perimeters, and open grounds.

SDS Perimeter detects gunfire and alerts on-site security in under 3 seconds via the software dashboard, SMS, and email. Every SDS software package includes ResponderLink, a built-in monitoring capability that automatically forwards verified alerts to a monitoring operator who contacts the appropriate 911 dispatch center with precise location data — eliminating the delays and inaccuracies of manual emergency calls.

Yes. SDS Perimeter includes caliber detection and reporting, grouping firearms into two categories: handguns and long guns (including shotguns). Caliber reporting accuracy exceeds 90%, though performance may vary based on the specific caliber and distance from the sensor. The system also calculates the range (distance) of the firearm from the sensor using time-of-arrival analysis of the acoustic and infrared signals.

Yes. SDS Perimeter integrates with 50+ third-party security platforms including video management systems, access control, and mass notification systems. This makes it easy to incorporate SDS into your existing security tech stack without replacing existing infrastructure. When a shot is detected, the system can automatically direct cameras to the incident location, trigger lockdowns, and distribute alerts across your entire security operation.

SDS Perimeter carries an IP65 weather rating, making it resistant to dust, rain, and wind. It operates in temperatures ranging from -35°C to 45°C and includes thermoelectric cooling devices within the infrared flash detectors to maintain performance in elevated ambient temperatures. It’s purpose-built for real-world outdoor deployment across school campuses, critical infrastructure sites, healthcare facilities, corporate perimeters, and public spaces.

SDS Perimeter was developed using machine-learning techniques applied to large libraries of real-world gunshot and non-gunshot events, enabling the system to differentiate gunfire from many common environmental noise sources such as vehicles and construction equipment. Note: environments with frequent explosive events — including fireworks displays, arc welding, or heavy construction — can increase the probability of a false alert. In these situations, the sensor can be temporarily disabled through the SDS Situational Awareness Application. The system also detects the shockwave of projectiles traveling at supersonic speeds, adding an additional layer of detection and analysis capability. Once deployed, the sensor operates using deterministic algorithms — processing happens at the sensor edge with no ongoing “learning” or cloud dependency — ensuring consistent, predictable performance suitable for life-safety applications.