The E3S-CR11 2M: If you need to verify fit for a panel that was built around a different Omron photoelectric sensor, the 0-3 m range is the headline spec. That's the number that governs whether it sees the part or just the background.
Mounting and wiring follow standard practice for this form factor. The sensing distance covers most conveyor and material-handling pickups up to three meters out. It's a straightforward swap-in for any application that needs that range.