Introduction
Active shooter incidents in commercial spaces remain one of the most urgent safety concerns for business owners and facility managers. A significant share of these events occur in places of commerce—retail stores, offices, and warehouses where employees and customers gather every day. The window between the first gunshot and the arrival of law enforcement is measured in minutes, and what happens during that interval often determines the outcome. SDS Powered by Alarm.com brings indoor gunshot detection directly into the Alarm.com for Business platform, giving small and medium businesses an integrated layer of threat response that was previously available only to large enterprises with dedicated security operations.
What Are Shooter Detection Systems (SDS)?
Shooter Detection Systems provide purpose-built indoor sensors designed to identify gunfire the moment it occurs. Each sensor (model ADC-SDS2001) combines two detection methods: acoustic microphones that listen for the concussive blast of a gunshot, and infrared optical sensors that detect the heat signature of a muzzle flash. By requiring confirmation from both modalities before triggering an alert, the system achieves a greater than 99% accuracy rate while filtering out false positives from sources like slamming doors, fireworks, or vehicle backfires. The sensors do not require direct line-of-sight to the firearm, meaning a shot fired with the shooter facing away from the sensor or from behind a small object can still be detected within coverage range.
How SDS Powered by Alarm.com Works
Detection Technology
Each SDS indoor sensor houses two acoustic microphones and two infrared detectors behind a discreet 4-by-4-inch housing that mounts flush to a wall or ceiling, or surface-mounts on brick, concrete, and other hard surfaces. A single sensor covers approximately 2,500 square feet with omnidirectional detection, and multiple sensors can be deployed for overlapping coverage in larger layouts. The sensors connect via Power over Ethernet (PoE), delivering both data and power through a single cable run. Cellular backup ensures the system remains operational during power or network disruptions.
Alert and Response Chain
When a sensor confirms a gunshot, the signal reaches Alarm.com's cloud platform in less than one second. The business owner receives immediate push and SMS notifications through the Alarm.com for Business app. Simultaneously, the alert forwards to the professional monitoring center, where operators can verify the event using linked video feeds and dispatch emergency services. Depending on configuration, the platform can also trigger mass notifications to employees, activate sirens and strobe lights, initiate automatic 911 dialing, and engage access control lockdown protocols. These automated rules execute in parallel the moment a gunshot is confirmed.
Installation and Testing
SDS sensors easy to install and test. Mounting height is typically 9 to 12 feet with planned coverage overlap. After installation, each sensor is verified using the SDS Gunshot Detection Handheld Tester (model ADC-SDS1000), a device that simulates gunshot acoustic and infrared signatures without live fire, confirming detection coverage and alert routing in every zone.
Key Features
Accuracy and Coverage
The dual detection method delivers greater than 99% accuracy across weapon types from low-caliber handguns (.22 caliber) through semi-automatic and automatic rifles (per Alarm.com documentation). Each sensor's 2,500-square-foot coverage means moderate commercial spaces can often be covered with just a few units. Built-in false-alert filtering distinguishes gunfire from other impulse sounds, and firmware updates arrive through the platform so algorithms improve without physical service visits.
Integrations with Alarm.com Video, Alarms, and Access Control
A confirmed gunshot event can automatically trigger Alarm.com cameras to capture and upload video clips, giving operators and law enforcement visual context within seconds. Access control systems can execute lockdown sequences—securing perimeter doors, restricting elevators, or releasing magnetic locks on evacuation routes. Intrusion alarm sirens and strobes can activate for building-wide warning. These integrations transform detection from a standalone alert into coordinated incident response addressing notification, verification, containment, and evidence capture simultaneously.
Management via the Alarm.com Platform
SDS sensors are managed through the same Alarm.com for Business interface used for cameras, access control, and intrusion panels. Sensor health, connectivity, and event history are visible in the dashboard. The Partner Portal provides provisioning, diagnostics, and remote configuration tools. Gunshot detection becomes another layer within the security infrastructure the business already operates—no separate application required.
Setting Up SDS for Your Business
Deployment requires a Surety Business account with gunshot detection and a PoE-capable network infrastructure. Core components are ADC-SDS2001 sensors (quantity based on facility layout) and at least one ADC-SDS1000 handheld tester. The process follows a site survey, physical installation and PoE wiring, account pairing, automation rule configuration, and zone-by-zone verification testing.
Best Practices and Use Cases
In retail environments, sensors on the sales floor, stockroom corridors, and back-office areas cover where customers and employees are present. Office buildings benefit from sensors in lobbies, open work areas, and hallway intersections where early detection enables rapid evacuation or shelter-in-place. Pairing SDS sensors with Alarm.com video cameras in the same zones ensures detection events include visual verification, accelerating and aiding dispatch, and providing post-incident evidence. Businesses should integrate gunshot detection alerts into existing emergency action plans so employees understand the automated responses that will occur.
Limitations and Complementary Technology
SDS sensors are designed for indoor environments. Outdoor areas or facilities with extremely high ambient noise may require careful placement and testing. Coverage is per sensor, so larger facilities need more units, affecting cost. Gunshot detection accelerates response but does not prevent incidents—it does not replace physical security measures, access control policies, or employee safety training. For a comprehensive posture, SDS works best alongside video analytics, real-time video monitoring, and professionally monitored intrusion and access control.
Why SDS Enhances SMB Threat Protection
Enterprise-grade detection systems historically carried enterprise-grade costs and required dedicated security teams. SDS Powered by Alarm.com changes that by embedding gunshot detection into a platform SMBs already use for everyday security. No separate monitoring contract, no additional software, no isolated system. Sub-second detection to cloud, immediate automated alerts, and visual verification for central station operators compress the response timeline when it matters most. Those seconds are the difference between an uncoordinated response and one where doors are locking, authorities are being contacted, and occupants are being warned simultaneously.
Conclusion
Shooter detection Powered by Alarm.com brings proven gunshot detection into a unified commercial security platform built for the realities of small and medium businesses. Acoustic and infrared sensors paired with automated alert routing, video verification, and access control integration compress the critical response timeline from minutes to seconds. For business owners strengthening their facility's active threat preparedness, SDS is a meaningful capability that works within the security infrastructure they already manage. To explore integrated business security solutions, visit Surety Business.