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A History of
Innovation and Expertise

Discover how SONITROL was created, and how it continues to deliver the best security and emergency solutions for better emergency response.

Verified Response



More than 55 years ago, with the help of a police officer, SONITROL was founded with the goal of reducing false alarms and increasing criminal apprehensions. With service in cities all across North America, SONITROL offers cutting-edge security when and where you need it most.


We design modular, scalable solutions to fit the unique needs of each industry, organization and facility we serve. With a growing national and international network serving customers of all sizes, we have the expertise to tailor an ideal solution for your security requirements; all monitored by our 24/7 Central Station.


Sonitrol has provided comprehensive school security solutions for the educational community for more than 55 years. Today, Sonitrol is one of the largest providers of school security systems in North America, serving more than 12,000 schools. We are experts at assessing your school's vulnerabilities and recommending appropriate, cost-effective solutions.


Sonitrol is a leader in modular, scalable security solutions that minimize shrinkage and drive a solid return on investment. Our state-of-the art technology includes verified audio & video intrusion detection, verified digital video surveillance, access control and fire detection. Our alarm systems can also be integrated with HVAC and other building systems.


Whether you run a small shop or a booming operation, your business is vulnerable on a variety of fronts. Burglars looking for cash or computer equipment aren't the only threat. Employee theft is a growing issue, and it costs American businesses billions of dollars each year. In the United States alone, more than 5,000 cases of workplace violence are reported every day.


High public traffic and inventories of drugs put hospitals and other healthcare facilities at risk of internal and external theft, and burglary. Today, stringent HIPAA guidelines make security even more critical. Sonitrol offers solutions that help healthcare facilities comply with HIPAA regulations and protect their property, assets, employees and patients.


Sonitrol helps keep guns off the streets as Pawn and Gun shops are prime targets for thieves. Criminals know pawn shops have a high concentration of valuable merchandise, including guns, that can be quickly converted into cash, and they can get in and out before the police have a chance to arrive. With Sonitrol, your chances are better at apprehending these types of criminals.


Sonitrol builds a better security system. Whether you're starting from the ground up or renovating an existing building, you're vulnerable to break-ins, vandalism, fire and other threats. Sonitrol provides integrated security solutions for construction sites nationwide. We have a program specifically tailored to meet the unique needs of new buildings.


Your dealership is vulnerable to a variety of threats. Fortunately, you have a partner in protection. Our unique verified audio & video detection and verified video deliver comprehensive projection for your dealership. Whether you have a single dealership or a regional chain, our modular, scalable designs make it easy protect your business today and meet your needs.


Cash is the classic temptation causing robberies, burglaries, vandalism and false ATM transactions. Sonitrol offers a program specifically tailored to meet your needs. Based on our proprietary verified audio & video detection, a Sonitrol system delivers effective protection with low false alarms, lightning-quick police response, and the highest apprehension rate in the industry.


Sonitrol can help protect your people and your property. Your organization does tremendous good for the community you serve. A burglary, a fire, even a false accusation could seriously threaten your ability to carry out your mission. Sonitrol provides integrated security solutions specifically tailored to the needs of faith-based and other non-profit organizations. 


In this day and age, security is more critical than ever. Sonitrol offers an integrated set of solutions for protecting and securing your buildings, assets, employees and the public. And because Sonitrol products and solutions are listed on a GSA Schedule (GS-07F-9298S), we can work with you to implement electronic security solutions for your facilities at the lowest fixed price.


Traditional security systems are limited by the size and layout of a warehouse or distribution center. Even with multiple motion sensors to protect each door, aisle or row of goods, vulnerabilities still exist in the ceilings and walls. Using our unique audio & video verification technology, our Audio Sensor can cover up to 5,000 square feet of open space.

The Industry's

Strongest Guarantee*

SONITROL's technology, service and results allow us to confidently offer the industry's most comprehensive warranty-covering satisfaction, performance, service response, false alarm protection, and more.


*Guarantees may vary by location

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A heritage of technical innovation.

Robert Baxter, of Anderson, Indiana, installed microphones within the walls of a building to listen for termites and pinpoint their location. Baxter invented other sound-related devices, too. On June 16, 1960, he incorporated "Sonitrol", from the words sound and control, to manufacture and market his innovations. 

Bob Baxter

In 1963, Baxter met Al Cronk, a local police officer who owned an alarm company. Cronk was frustrated with systems that seemed to let the perpetrators get away. He joined with Baxter, the inventor, to develop ideas for a new alarm company. Baxter responded with the audio sensor, and Sonitrol was born as a security company the following year.

Al Cronk

Sonitrol developed a franchise concept and distribution network and became the largest franchise security network

Central Station

Sonitrol sold its first franchise in Detroit, Michigan which developed several key Sonitrol individuals, and sold their first school security system.


The Sonitrol Corporation changes ownership, purchased by venture capital group in Washington D.C. owned by Harry Flemming. The Corporation moves from Indiana to Orlando, Florida.

Harry Flemming

The Sonitrol Warranty Program introduced.

Cutting-Edge Security

Cutting-Edge Security

When & Where you need it most

Single source integrated security solutions for intrusion, video, access and fire. As more cities and municipalities require verification before dispatching police to an alarm, our ability to verify intrusion—through patented technology, in real-time—offers unrivaled credibility with law enforcement and security for our customers.