The DP Sensor (toner-level detection sensor) for the Canon imageRUNNER iR 3030 commonly identified by part number FK2‑0358‑000 serves as a critical component in the printer’s supply management system. This compact optical or mechanical sensor accurately monitors toner levels and enables the printer to warn users when toner is low. When toner falls below a certain threshold, the DP Sensor triggers a warning message on the device’s interface, prompting a toner cartridge replacement. Engineered for compatibility with Canon's internal sensing logic, it ensures print quality and operational continuity. Its efficient, low-maintenance design contributes to minimizing downtime and enhancing user convenience. Reliable and often stocked among replacement parts, it plays an essential role in maintaining optimal printing performance.