The E3T-ST23-M1TJ 0.3M is a through-beam photoelectric sensor from Omron's E3T series, built for reliable object detection at 300mm. Output is PNP Light-ON via a connector — check your PLC input logic before dropping it in; if your machine expects Dark-ON or a wired terminal, the sibling E3T-ST24 2M handles that. The 1ms response time covers most packaging and conveyor applications; adjustable sensitivity helps compensate for lens fogging or target variation. IP67 means it stands up to washdown and dust without an extra enclosure.
The E3T-ST24 2M is a through-beam sensor with 300mm range, PNP Dark-ON output, and cable connection. The E3T-FT11R offers 500mm range but NPN output — not a plug-in swap if your input card is PNP. Stick with the ST23 for PNP systems.