Specification Overview
The Omron EE-SX872A is a through-beam photoelectric sensor from the SX87 series, providing a 5 mm sensing distance for detecting opaque objects as small as 2 mm x 0.8 mm, with a response time of 0.17 msec. The sensor operates on a 5-24V DC supply, delivers an NPN output with a maximum load current of 100 mA, and is set to Light-On switching mode. The switching frequency is rated at 3 kHz, supporting high-speed detection in automation sequences.
Selection Considerations vs. Peer Models
Compared to the Omron E3Z-T61K 2M, the EE-SX872A offers a significantly shorter sensing distance (5 mm vs. 15 m) and a lower IP rating (IP64 vs. IP67), but provides a faster response (0.17 msec vs. 1 msec). The E3T-FT11 has a longer sensing range of 500 mm and IP67 but uses red LED light and has a slower response of 1 msec, while the EE-SX872A uses infrared light. Neither peer shares the T-slot body style of the EE-SX872A; they are rectangular, requiring different mounting provisions.
Mechanical and Electrical Integration
The sensor has a compact T-slot body measuring 12 mm × 12 mm × 31 mm, constructed from PBT, and is rated IP64 for dust and splash-water resistance. Electrical connection is via a prewired 2 m cable with bare wire ends; the NPN output is compatible with most PLC digital inputs and sinks up to 100 mA. An integral indicator confirms power-on and switching state, aiding commissioning and troubleshooting.
Regulatory Documentation
The EE-SX872A carries CE and RU compliance marks, as indicated in the standard documentation, satisfying the certification requirements for European and Russian markets.