The OMRON EE-SX671P is a through-beam photoelectric sensor from the EE-SX67 series, designed for detecting small opaque objects down to 2 mm x 0.8 mm at a fixed sensing distance of 5 mm. It operates on a 5-24V DC supply with a PNP output and a fast 0.17 ms response time, making it suitable for high-speed part detection in compact spaces.
The 5 mm sensing distance is fixed — this is not a through-beam pair with meter-range reach; it is an L-slot style sensor meant for detecting the presence of a flag, cam, or small part passing through the gap. The minimum detectable object of 2 mm x 0.8 mm opaque means it catches small actuator tabs or thin web edges that a larger-beam sensor would miss. The 0.17 ms response time and 3 kHz switching frequency mean it can track fast-moving targets on a pick-and-place or rotary-index machine without missing counts. The PNP output (sourcing) is standard for many PLC inputs; verify your input card sinks, not sources. Output short-circuit protection is built in, so a miswire on the load side won't kill the output transistor — a practical safeguard during panel commissioning or field replacement. IP50 means it is dust-protected but not sealed against water jets; keep it inside a cabinet or dry location. The PBT body and solder-terminal connection suit a fixed installation where the sensor is wired directly into the control circuit rather than plugged in.