The LiftMaster OES-SD24 Sectional Door Optical Edge Kit is a monitored safety edge system engineered for sectional overhead doors up to 24 ft wide. Designed to provide primary entrapment protection in accordance with UL 325 when used with compatible LiftMaster commercial door operators, this optical edge senses contact along the full bottom leading edge of the door and signals the operator to stop and reverse. It’s a dependable choice for commercial and industrial applications—such as warehouses, loading docks, and service bays—where reliable, code-compliant safety is required and where buyers may be replacing a worn sensing edge or upgrading from older air-wave styles.
This optical edge kit is purpose-built for sectional doors and connects to the operator’s monitored safety input through a low-voltage supervised circuit. Compatibility is intended for LiftMaster commercial operators that support a monitored optical sensing edge; consult the operator manual to confirm device support or whether a monitored edge interface is required. Typical installation involves attaching the sensing edge to the door’s bottom astragal/angle, routing the lead to the operator via an appropriate cord reel or coil cord, and programming the control board to recognize the monitored edge before finalizing functional tests. For best results, follow LiftMaster installation and testing procedures, verify proper reversal upon contact, and perform routine safety checks as part of ongoing maintenance. Keywords: LiftMaster OES-SD24, optical safety edge kit, sectional door safety edge, monitored entrapment protection, UL 325, commercial door operator accessory, replacement safety edge, retrofit/upgrade.