Confirm the exact configuration
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.

Omron
The Omron E3FA-RP21 is a cylindrical axial photoelectric sensor featuring a retro-reflective sensing method with a sensing distance ranging from 100 to 4000 mm via polarized red light. Housed in an M18 thread size ABS body with IP67 and IP69K protection, this unit utilizes an M12 connector, a 10-30 V power supply, and includes M.S.R. technology with manual adjustment for its PNP output supporting both Dark-ON and Light-ON operation modes at a 0.5 ms response time. Please submit the exact part number, quantity, and application requirements for an RFQ.
Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued Omron references — within one business day.
For a faster response, include quantity, condition, and delivery destination.
Verified configuration
Engineering context
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Our sourcing response is prepared against Omron E3FA-RP21. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.