Electric Latch Retraction (ELR)

Since 2012, when SDC launched QuietDuo™ – the first Motorized ELR Kits to convert mechanical exit devices – we’ve been “quietly” leading in electric latch retraction (ELR) upgrades for access control. This includes retrofit solutions for most brands of exit devices as well as innovative SDC exit devices & mortise locksets with factory-installed ELR and automatic door operators with a built-in 1 Amp+ power supply to power them. Discover the transformative potential of electric latch retraction technology in revolutionizing security systems and enhancing protection.

We Will Be Closed

It is with great sadness, and also with great gratitude for having known and worked with her, that we announce Rhonda’s passing Thursday morning, August 15th, after a difficult illness.

The Integrator’s Choice Since 1995

SDC pioneered the revolutionary delayed egress locking category in 1985. We patented the ExitCheck® 1511S series in 1995  – the first delayed egress lock to integrate a visual digital display, verbal countdown and alarm tone, alternating verbal message and door release indicator.

Later, we added the ExitCheck® 1511T series for double doors and the 1581S mini delayed egress for smaller security needs and budgets. With the deepest line of complementary accessories, SDC provides the most comprehensive delayed egress solutions in the industry. Explore the importance of delayed egress devices in ensuring security and compliance in various settings.

Network Doors Like a Pro

Integrate door openings easily into fully featured EAC systems without being an enterprise IT expert. SDC IP Pro® IPD Series IP-based single door access controllers allow expansion from one Standalone door up to a 100-door “Grid.” Avoid the headaches of costlier, more complicated enterprise solutions. Use IP Pro® with our PoE Capable Locking Hardware to bridge the gap between traditional locking hardware and IT networks.

Upgrade your security system with IP-based access control for doors. Discover the benefits and possibilities of integrating door openings into EAC systems.

We Will Be Closed Thursday July 4^th, 2024

Celebrating Founder's Day

Designed, Engineered, and Built in America 

Since 1972, SDC has manufactured popular electrified access control hardware like Bolt Locks, EMLocks® and Strikes in America while most of our larger competitors manufacture overseas. We’re known as the door control opening experts with more than 40 patents, 20+ active trademark brands and decades of product design firsts.

SDC’s locking systems can be found in virtually any application where access control of a door is required. We’re particularly adept at new or retrofit applications of 1 – 10 doors, where 80% of the security door and hardware market exists. 

There are numerous advantages to choosing our American-made products for your access control and security needs. Not only do these devices offer superior quality and reliability, but they also support the American economy and job market. Additionally, they comply with higher industry standards and provide a wide range of options to suit your specific requirements.

By opting for SDC products made in the USA for over 50 years, you can enjoy enhanced security and peace of mind, knowing that you have chosen a reliable and trustworthy solution.

Discover how the aging of the U.S. population represents Electronic Access Control (EAC) opportunities for door hardware and security professionals in SDC’s article from the April, 2024 issue of Door Security + Safety Magazine.

Explore the critical role that classroom door security plays in ensuring the safety of students and teachers in schools in SDC's article from the May, 2024 issue of Door Security + Safety Magazine.