Omron E3FB-RP21 Photoelectric Sensor

The Omron E3FB-RP21 Photoelectric Sensor is a compact retro-reflective sensor used in industrial automation across India. It features retro-reflective with M.S.R. function, a 100 mm to 4 m sensing distance (with E39-R1S), 10 to 30 VDC power supply, and a PNP output. This unit belongs to the E3FB Series and is built in a metal M18 cylindrical housing with an M12 connector for reliable field connection.

Used on conveyors, packaging lines, assembly stations, and pick-and-place machines, the E3FB-RP21 delivers stable detection and low false triggering. Its quick 0.5 ms response and single-turn sensitivity adjuster simplify setup, while IP67/IP69K ratings support washdown and dusty environments. The design supports long duty cycles common in manufacturing and material handling applications.

The Omron E3FB-RP21 Photoelectric Sensor has close variations for specific needs. Omron E3FB-RN21 offers similar retro-reflective sensing but with NPN output suitable for NPN logic systems. Omron E3FB-RP11 2M provides PNP output like the RP21 but comes with a pre-wired 2 m cable instead of an M12 connector for fixed installations. Omron E3FB-DP21 is a diffuse-reflective type model designed for shorter distance detection around 100 mm. Each linked model highlights specific differences in output, connection, or sensing method, helping engineers choose based on system requirements.

Omron manufactures the E3FB-RP21 to meet industrial reliability expectations with a metal body and robust ingress protection. The sensor’s PNP output and M12 connector option make it compatible with standard PLC inputs, while the E3FB Series pedigree ensures consistent performance across automated processes. For engineers specifying sensors in India’s manufacturing environments, the Omron E3FB-RP21 balances detection range, electrical compatibility, and mechanical durability.