E18-D80NK Adjustable Infrared Proximity Sensor

This sensor works on the same reflective infrared principle as a basic obstacle-avoidance module, but packages it in a sealed cylindrical metal housing rather than an open PCB - a meaningfully more durable form factor for permanent mounting on a robot chassis or in an enclosure where an exposed board would be vulnerable to dust or knocks. A built-in potentiometer lets the detection distance be tuned anywhere from 3cm to 80cm, a considerably wider adjustable range than most simple IR modules offer.

The 3-wire PNP output configuration is a standard industrial sensor wiring convention, differing from the NPN or simple digital-high style output found on hobbyist breakout boards - worth checking against a project's existing wiring convention before assuming drop-in compatibility. Reverse polarity protection and a wide -25°C to 70°C operating range make it suitable for less controlled environments than a typical indoor hobby project might see.

Common uses are industrial-style object counting and presence detection on conveyor or sorting systems, robot chassis proximity sensing where a sealed housing survives real-world knocks better than an open PCB, and any automation project needing a genuinely adjustable, durable IR proximity sensor rather than a fixed-range hobbyist module.