Used and surplus industrial sensors for sale. MRO Exchange carries a rotating selection of industrial sensors available for immediate purchase and fast nationwide shipping.

Industrial sensors are the eyes of an automated system. They detect the presence, position, distance, and state of objects and conditions on a machine or production line and feed that information to the PLC or control system driving the process. A conveyor that needs to know when a part has arrived at a station, a machine tool that needs to confirm a door is closed before a cycle starts, a packaging line that needs to detect a missing label — all of these depend on sensors to function reliably and safely. When a sensor fails the machine either stops, misses a detection, or worse, continues running without accurate process feedback.

Proximity sensors:
Inductive proximity sensors detect the presence of metallic objects without physical contact. They are the most widely used sensor type in industrial automation, found on virtually every machine tool, assembly system, and automated production line in manufacturing. They are rugged, reliable, and available in a wide range of sensing distances, housing styles, and output configurations. When an inductive proximity sensor fails on a production machine, finding a direct replacement quickly is the priority — thread size, sensing distance, output type, and connector configuration all need to match the existing installation.

Photoelectric sensors:
Photoelectric sensors use a light beam to detect the presence, absence, or distance of objects regardless of material. They are used across a wider range of applications than inductive sensors because they are not limited to metallic targets. Through-beam, retro-reflective, and diffuse sensing modes cover detection needs from long-range presence detection to close-range part verification on high-speed lines. Photoelectric sensors are common in packaging, material handling, and assembly automation where target materials vary.

MRO Exchange carries surplus proximity and photoelectric sensors from a range of industrial manufacturers. Inventory rotates regularly across housing styles, output configurations, and sensing modes. Every sensor listed ships nationwide from our facility in Illinois at prices well below new distributor cost. If you do not see your specific model listed, contact us directly.