Steris Corporation B-500173 Photo Interrupter

Photo Interupter (LS4) part number 500173 is an OEM Steris accessory built for Steris System 1® Plus and System 1® Express sterilization platforms. Listed as an ACCESSORIES item, its unit of measure is EA and it is returnable per Steris Shop specifications. As an optical sensing device, the LS4 photo interrupter detects beam interruptions, a common function of photo interrupter components used as accessories within Steris System 1 units. The OEM note from Steris—that using non-OEM parts can affect equipment reliability and regulatory status—further validates the part as an OEM accessory. The Steris official parts shop explicitly confirms compatibility with System 1 Plus and System 1 Express, ensuring proper fit for those configurations. This part carries the 500173 designation and is offered within Steris’ catalog of genuine OEM accessories, reinforcing its suitability for service, maintenance, or refurbishing tasks on supported Steris systems.