Field note – through-beam fit
The E3S-AT61-L: Sensitivity adjustment is a 2-turn knurled pot with clutch – set it once, it stays. No short-circuit protection on the output, so fuse the load side accordingly. The M12 connector mates with standard 4-pin cordsets; pin 4 is the load output (NPN sinking).
Lifecycle and sourcing posture
The order code E3S-AT61-L corresponds to E3SAT61L. Same sensor, different label format. A BOM line written around E3SAT61L drops in without rewiring.
