Be Prepared.
Be Connected.

Full Spectrum Mass Notification Systems, Consulting, and Solutions.

The DH Sales Group has more than 28 years of success providing outdoor warning sirens and mass notification systems to cities, counties, industrial plants, college campuses, and others across Texas, Oklahoma, Arkansas and Louisiana. This year we are pleased to announce a new partnership with American Signal Corporation (ASC).

Established in 1942, in the wake of a World War, American Signal Corporation’s first air raid sirens and speaker arrays paved the way for giant voice systems and digital alerts. ASC’s innovation is again seen with their fully-integrated cloud-based disaster detection and notification systems. Whether it’s two sirens or an entire system, American Signal Corporation and DH Sales Group can design & implement whatever is necessary to fit your warning system needs, no matter how large or small.

Whether it’s two sirens or an entire system, American Signal Corporation and DH Sales Group can design and implement whatever is necessary to fit your warning system needs.

DH Sales Group is the only warning siren and mass notification sales company in its region with the experience, knowledge, and resources to give professional, quality system designs and recommendations. We have an array of services for those in need of a new mass notification system as well as those with existing systems.

Contact Us Today To Start Your Project

Warning System Services

  • On-Site Sound Studies

    Acoustic analysis and on-site examination of both current and potential mass notification systems. Potential problems may be areas that have “grown” beyond their notification perimeter and others that may have degraded due to background noise.

  • Warning System Designs

    After gathering data our experts can build a system suited to your situation. A variety of solutions to your mass notification needs will be presented to you via presentation, webinar, acoustic maps, and more .

  • Customized Solutions

    Sirens, digital signage, email, SMS, phone, voice sirens, LED boards and more. Moreover, we directly integrate every alert medium with sensors designed specifically for unique implementations, from flooding to inclement weather, radiation hazards to chemical exposure and beyond.

We Serve:

  • Severe Weather
  • Tornado
  • Flood
  • Tsunami
  • Civil Defense
  • Landslide

Outdoor Notification

The outdoor warning sirens and relay systems available from ASC represent the pinnacle for mass notifications and early warnings, and encompass all variables that may affect the safety and wellbeing of those who rely on them. From national weather service storm warnings to complete solutions for emergency and mass notifications, ASC’s outdoor alert technologies set the tone for worldwide safety.

ASC offers a broad range of electronic and mechanical sirens, along with industrial communications equipment that will reliably meet your emergency management responsibilities. ASC is dedicated to providing communities and facilities throughout the world with the most effective, reliable outdoor communications and alerting systems manufactured.

Learn more about outdoor solutions

Indoor Notification

Being able to disseminate information rapidly throughout your facilities is an essential function in maintaining the highest standards in safety and awareness, no matter the environment. At American Signal Corporation (ASC), our focus on designing and implementing the very best in interior notifications systems has led us to be a respected choice for safety and awareness worldwide.

In order to continually serve our customers to the highest degree of excellence possible, our holistic approach to indoor mass notification means that no avenue is left unexplored and no vulnerabilities exist within your system. In designing and implementing these technologies via a tailored approach to your facility’s unique needs, we’re able to fully integrate mass notification and emergency alerts on a level that’s robust, redundant and encompassing.

Learn more about indoor solutions


Purpose built to provide the ultimate mobility, reliability, and performance as the industry leading mass notification platform. Cloud enabled, available as SaaS (Software as a Service), or on premises CompuLert™ NEXGen is the only multi-threat detection multi-channel mass notification platform capable of interfacing with virtually any threat detection device and communicate life safety information over a myriad of technologies.

CompuLert™ NEXGen’s architecture was developed to support large, nationwide disaster management and emergency communications systems, down to individual small cities and villages. It provides our clients – and system integrators – with the ultimate capabilities to develop specific, robust solutions.

CompuLert™ NEXGen is a powerful mass notification platform, capable of seamlessly integrating critical communications systems with distributed data collection and sensing equipment, to provide custom life safety solutions.