Allen-Bradley 42GRF-9101 Photoswitch Fiber Optic Sensor

The Allen-Bradley 42GRF-9101 Photoswitch Fiber Optic Sensor is a compact, small-aperture photoelectric sensor in Rockwell’s Photoswitch 9000 family that uses a fiber-optic path for detection in tight spaces. It provides an SPDT relay output with adjustable sensitivity and selectable light-operate versus dark-operate modes, enabling reliable sensing of small parts or through-fiber configurations on production lines. The unit uses a visible red emitter and a fiber-optic sensing tip to monitor presence through the fiber path, making it suited for detecting small features in confined spaces on industrial equipment and packaging lines. The 42GRF-9101-QD variant adds an integral 5-pin Mini QD connector for quick field connections, and catalog listings confirm both 42GRF-9101 and 42GRF-9101-QD exist in the Photoswitch family.