Tubular background rejection — what it means on the line
The XUM4APXBM8 is a tubular background rejection photoelectric sensor from Schneider Electric's Telemecanique range. Background rejection means the sensor uses triangulation to ignore objects beyond the set sensing threshold — it sees the target but not the conveyor frame or machine guard behind it. This is the sensor you spec when the target moves past a reflective or irregular background that would false-trigger a standard diffuse sensor.
The XUM4APXBM8 carries UPC 389110966322 for inventory traceability. The sensor body is a tubular form factor — confirm the mounting bracket and connector cordset are in the kit before the tech heads to the panel. No holes in the box if the accessory pack matches the application.