What you're sourcing
The Schneider Electric XS8C1A1NAL10 is an XS8-series inductive proximity sensor in a flat 40 x 40 x 15 mm housing, intended for non-contact detection of metallic targets in industrial automation panels and machinery.
Form factor and mounting
The flat form factor at 40 x 40 x 15 mm gives a low-profile footprint that suits confined bracket or channel mounting where a tubular M18 or M30 barrel would not clear surrounding hardware.