Allen-Bradley 42RC1-4000 Reflex Beam Scanner Photoelectric Sensor

Allen-Bradley 42RC1-4000 is a Model 4000 Reflex Beam Scanner from the PHOTOSWITCH family, a compact retro-reflective photoelectric sensor designed for simple, noncontact part detection on manufacturing lines. In reflex configuration, the device emits a beam and uses reflections from the target to signal presence, enabling reliable detection of parts on conveyors, packaging equipment, and assembly stations without a separate transmitter. The 42RC1-4000 designation identifies this specific unit within the 4000-series Photoswitch lineup, which is known for rugged industrial sensing in tight spaces. Typical installations benefit from its integrated optics and straightforward mounting, delivering fast response for line-speed applications and easy integration with existing Allen-Bradley control architectures. This model is commonly used where quick setup and dependable presence sensing are required in harsh factory environments.