Sensor class and production status
The E2K-L13MC2 2M is a capacitive proximity sensor from Omron, listed under Limit and Proximity Switches and more specifically Proximity Detection Switches.
What the capacitive sensing means for fit
Capacitive sensors detect both conductive and non-conductive materials — plastic, glass, wood, liquids — through a non-metallic container wall, which inductive sensors cannot do.
Sourcing posture for this Omron sensor
As an active-production part, the E2K-L13MC2 2M is quoted to order against the BOM quantity through independent distribution channels.