Police Magazine Logo
MenuMENU
SearchSEARCH

Technology Preview: Detecting Weapons with Radio Waves

First Responder Technologies is working on a system that uses WiFi to improve the security of public buildings.

September 11, 2019
Technology Preview: Detecting Weapons with Radio Waves

Artist rendering of how the WiFi technology licensed by First Responder Technologies can detect concealed weapons. The company hopes to have a beta product by next summer.

Credit:

Image: First Responder Technologies

3 min to read


In the wake of the El Paso and Dayton mass shootings, many American law enforcement officers and private security professionals are asking how these attacks can be prevented or at least mitigated. Canada's First Responder Technologies believes it may have the answer, a new way of detecting concealed firearms.

The new Concealed Weapon Detection Device being developed by First Responder uses WiFi signals to detect hidden threats. The technology was developed by researchers at Rutgers University in the School of Engineering's Wireless Information Network Laboratory. First Responder recently secured exclusive rights to commercialize the concept.

Ad Loading...

Robert Delamar, CEO of First Responder Technologies, says the Rutgers research is a "very impressive feat of engineering." He likens the technology to radar. The WiFi signal is transmitted around the area being protected and when it is reflected off of a suspicious object it can alert security personnel.

First Responder says there are advantages to using WiFi instead of millimeter wave technology currently in use at many of the nation's airports. The WiFi system uses a lower frequency for better penetration of clothes, cases, and packs; there is no need for an FCC operating license to use it; and there are no known health risks, the company says on its website.

The inventor of the WiFi weapon detection technology, Yingying (Jennifer) Chen, a professor at Rutgers, believes it's a "game changer" for the security profession. "The cost will be much lower than X-ray-based systems," she says on a First Responder Technologies' video. Because of the lower cost, Chen says more facilities will have better security. "Public safety could be significantly improved," she says.

The WiFi signals can be used to detect cans, laptops, batteries inside bombs, and liquids as well as guns. But Delamar says his company's primary focus at the moment is developing a practical tool for detecting guns in areas where they should not be, especially long guns.

He envisions the system augmenting other security measures at schools and other public buildings. The First Responder system would not require additional security personnel and it would not inconvenience the public. "It will produce a detection field that people can walk through," according to Delamar. "It could look like fence posts around the building, so it's relatively inconspicuous," he explains.

Ad Loading...

Delamar says the system uses WiFi points like the ones used for internet connectivity and three access points are sufficient for covering 20 meters (66 feet) of space.

First Responder is currently working with Rutgers and the Canadian engineering firm Misty West to develop a prototype, and Delamar says he believes the company will be able to demonstrate it soon. The next step after that is a beta product, which he believes will be available for testing in summer 2020.

"This is all about finding a way to create a better perimeter detection system," Delamar says. And he realizes the urgency for such a new security concept and what it could mean for law enforcement and the American public.

How Technology Mitigates Threats at Large-Scale Events

Learn more about how technology is evolving to make large-scale events safer.

DOWNLOAD FREE EBOOK

Ad Loading...

"A mass shooter is intent on killing as many people as quickly as possible," he says. "If this technology can give law enforcement and security a 10-, 15-, or 30-second heads up, that can save a lot of lives."

In addition to developing the WiFi weapons detection technology for facility security, First Responder is working on a wearable WiFi weapon detection system for law enforcement. And the company is even working on a short lifespan pepper spray. As Delamar is quick to point out, the "technologies" is in the company's name for a reason. "It's plural because we are actually developing several technologies for first responders," he says.

www.1strespondertechnologies.com

Subscribe to our newsletter

More Technology

Man working in front of multiple computer screens.
TechnologyApril 22, 2026

Motorola Solutions Now Part of the Cyber Threat Alliance

Motorola Solutions is now part of the Cyber Threat Alliance, the first formally organized nonprofit group of cybersecurity practitioners that work together in good faith to share threat information and improve global defenses against advanced cyber adversaries.

Read More →
Bar chart showing what police departments spend budget on for security.
TechnologyApril 22, 2026

Genetec 2026 State of Physical Security Report Reveals Public Safety Priorities & Challenges

Survey results from Genetec’s 2026 State of Physical Security Report highlight the demand for integrated systems that improve response times and reduce investigative workload. Nearly nine in 10 respondents said they use security data to help keep officers safe.

Read More →
Tinted blue background image of traffic with inset images for an ALPR camera, a police dispatcher, and a logo for Flock Safety.
TechnologyApril 16, 2026

Flock Safety Introduces Audit Assistance, Its Latest Trust & Compliance Tool

Audit Assistance is the latest tool in the Flock Trust & Compliance suite, a first-of-its-kind set of products and services that provides communities with guardrails and customization for accountability, transparency, and responsible use of the Flock platform.

Read More →
Ad Loading...
image of one closed laptop and one open laptop with Toughbook logo on screen, all against a blue gradient background
TechnologyApril 16, 2026

Panasonic Connect Launches the Toughbook 56

The Toughbook 56, the latest rugged laptop from Panasonic Connect, delivers enhanced performance, refined design, new levels of security, and power-efficient workflows in demanding environments.

Read More →
Collection of traffic control signs against a city backdrop and logos for Radarsign and Sourcewell.
TechnologyApril 16, 2026

Radarsign Awarded Sourcewell Contract Expanding Access to Traffic Safety Solutions

Radarsign’s traffic safety portfolio, including radar speed signs, flashing beacon systems, and more, are now available through Sourcewell purchasing contracts.

Read More →
Rooftop view off a drone detection devise with two small rubber antennas with an view overlooking a large domed event venue.
TechnologyApril 9, 2026

D-Fend Solutions’ EnforceAir C-UAS System Secures Key Event with RF-Cyber Counter-Drone Technology

D-Fend Solutions deployed its EnforceAir C-UAS system in support of local police to help secure a 19,000-attendee event, leveraging its non-jamming approach to keep communications and authorized drones operational while safeguarding against rogue drone threats.

Read More →
Ad Loading...
Graphic showing four priorities for secure enterprise cloud adoption and a logo for Genetec.
TechnologyApril 2, 2026

Genetec Highlights Why Governance Defines Secure Cloud Adoption in Enterprise Physical Security

With World Cloud Security Day on April 3, Genetec outlines how enterprises can strengthen resilience as they modernize physical security in the cloud.

Read More →
police car geotab thumbnail for services whitepaper
SponsoredApril 1, 2026

A police department’s guide to fleet management and vehicle health

Today’s police departments face rising fleet costs and must stay ready to respond, no matter the call. In this eBook, get powerful insights to enhance your police fleet’s cost-efficiency, reliability and performance through data-driven tactics.

Read More →
An automated license plate reader mounted on rear trunk of a car.
TechnologyMarch 26, 2026

Public Safety Surveillance Technology: Built on Compliance and Trust

ALPR solutions provider Leonardo explains why leveraging technology for safety must never come at the expense of constitutional rights or community trust. Every action within an ALPR system should be logged in a tamper-proof audit trail with query records of who accessed what data, when, and for what purpose.

Read More →
Ad Loading...
Promotional graphic for Patrolfinder featuring a police chief’s headshot inside a circular frame alongside a police SUV in the background. The headline reads: “Built for Patrol: How One Police Chief Fixed Communication, Boosted Visibility, and Changed the Culture.”
SponsoredMarch 17, 2026

Built for Patrol: How One Police Chief Fixed Communication, Boosted Visibility, and Changed the Culture

Patrol work hasn’t changed—but the expectations on officers have. See how one police chief helped officers get the right information at the right time, improve patrol visibility, and strengthen trust without adding complexity or surveillance. This real-world story shows how patrol-driven technology can make the job safer, smarter, and more effective—starting on day one.

Read More →