Tubular background rejection — what it means on the line
The XUM5APXBL2 is a tubular background rejection photoelectric sensor from Schneider Electric's Telemecanique range, meaning it detects an object by its presence against a background without false triggering from the background surface itself. This is the sensor you spec when the conveyor, chute, or machine frame behind the target would otherwise cause a standard diffuse sensor to see the background and miss the part.