Based on this product's specifications, here are some alternatives and similar models
Optical Fork Sensor Panasonic PM-L25-R, L-type, 5–24 V DC, light/dark switching
Summary description:
Panasonic PM-L25-R is an L-type optical fork (gabel) sensor for object detection. Operates on 5–24 V DC and supports both light-on and dark-on switching modes. Designed for through-beam detection of small parts, labels or edges in automation and packaging lines, it provides non-contact sensing in confined spaces and simple installation in production equipment.