Omron E3FA-RP21 Photoelectric Sensor

Omron E3FA-RP21 is a PNP retro-reflective photoelectric sensor with a 0.1–4 m sensing distance and an M12 connector. It works with the E39-R1S reflector, its MSR (mirror surface rejection) function prevents shiny objects from being mistaken for the reflector, and the connector lets you replace the sensor while keeping the machine-side cable. For the same sensor with a fixed cable, see the E3FA-RP11 2M. It is part of the Omron E3FA Series. Explore more Omron photoelectric sensors.

Brand	Omron
Product	Photoelectric Sensors
Model Number	E3FA-RP21

Omron E3FA-RP21 Photoelectric Sensor – Technical Specifications

Specification	Value
Sensing Method	Retro-reflective with MSR function
Shape	Cylindrical axial
Sensing Distance	0.1 to 4 m with E39-R1S
Power Supply Voltage	10 to 30 VDC
Output Configuration	PNP
Connection Method	M12 Connector
Light Source (Wavelength)	Red LED
Thread Size	M18
Length	45 mm
Operation Mode	Light-ON/Dark-ON
Response Time	0.5ms
Degree Of Protection	IP67/IP69K
Material Housing	ABS
Features	M.S.R.

Which E3FA Retro-Reflective (MSR) Model Do You Need?

Model	Type	Range	Output	Connection
E3FA-RN11 2M	Standard	0.1–4 m	NPN	2 m cable
E3FA-RN21	Standard	0.1–4 m	NPN	M12 connector
E3FA-RP11 2M	Standard	0.1–4 m	PNP	2 m cable
E3FA-RP21	Standard	0.1–4 m	PNP	M12 connector
E3FA-RN12 2M	Coaxial	0–500 mm	NPN	2 m cable
E3FA-RP22	Coaxial	0–500 mm	PNP	M12 connector

All ranges are with the E39-R1S reflector.