Since 1968, Sentinel The Alarm Company has broadened its markets from basic security packages to comprehensive, state-of-the-art systems and advanced monitoring services. Today we integrate emerging technologies to provide effective security systems for thousands of homes, businesses, schools and government facilities all over the Dallas/Fort Worth metroplex. We are always ready, willing and able to solve our clients' security needs and your security is our priority. We custom design, install, maintain and monitor all systems, providing the highest level of security products and services. Sentinel has a reputation for quality and we have maintained positive long-term relationships with our loyal DFW customers for nearly 50 years now.