What it is and where it sits
The Schneider Electric XS8C1A1PAL10 is an XS8-series inductive proximity sensor in the flat 40 x 40 x 15 mm housing, with the 15 mm size class declared on this catalog line. Inductive sensors of this form factor are used for non-contact detection of metallic targets on conveyors, machine tools, and assembly fixtures, where the flat body sits flush against a mounting surface or bracket.
Catalog identity cross-check
The title and description both list XS8C1A1PAL10 under the XS8 40x40x15 product type, matching the sensor name on the line.