Security Door Controls is an ISO 9001 certified manufacturer security access control hardware, equipment and systems. Included in this page is information regarding the Entry Check digital keypad and proximity card access control systems for commercial building, industrial, institutional, government, transportation and airline security. Products are also commonly known as keyless entry system, digital keypad door lock, proximity card readers, prox card reader, security card access control system, digital entry door locks and electronic access control.

Other SDC product lines include, electromagnetic locks, stand alone battery powered locksets, electrified mortise and cylindrical locks, electric strikes, electric deadbolts, exit sense bars and access control power supplies.

SDC electric locks are compatible with biometric (hand, fingerprint, eye), keypad and card access control systems and are an integral part of a security access control system. SDC products are sold through an authorized wholesale security equipment and access control distributor network. SDC and EntryCheck are registered trademarks of Security Door Controls.