OS-CX-05 is a round slit mask accessory designed for use with the CX-412 series thru-beam photoelectric sensors. It features a f0.5 mm slit size that enables precise detection of small objects with a minimum sensing object size of f0.5 mm. When installed, the sensing range is reduced to 600 mm, with a minimum sensing distance of 30 mm. The slit mask has a f12 mm outer diameter and is ideal for applications requiring high-precision small object detection or narrow beam focusing in industrial automation environments.