Name: Omron E3JK-RR12-C 2M Retro-Reflective Photoelectric Sensor - INOSAKI
SKU: Omron-E3JK-RR12-C
Price: 31.75 USD
Availability: InStock

Technical Overview

The Omron E3JK-RR12-C 2M is a high-performance retro-reflective photoelectric sensor designed for dependable object detection in industrial automation environments. Featuring a built-in Mutual Interference Prevention (MSR) function and a visible red LED light source (624 nm), this sensor provides highly accurate sensing at distances up to 6 meters with an E39-R1 reflector or 10 meters with an E39-R2 reflector. A rugged IP64-rated ABS housing protects against dust and moisture, making it resilient in semi-outdoor or factory conditions. With its versatile universal AC/DC built-in power supply and pre-wired 2-meter cable, it offers straightforward installation and integration with legacy or modern relay-driven control systems.

Key Features

Retro-reflectivesensingmethodwithbuilt-inMutualInterferencePrevention(MSR)function[1.3]
Wide universal power supply range (24 to 240 VDC / 24 to 240 VAC)
Visible red LED (624 nm) light source for easy spot alignment
Relay output configuration (SPDT, 250 VAC, 3 A max.)
Sensing distance of 100 mm to 6 m (with E39-R1) or up to 10 m (with E39-R2)
Selectable Light-ON/Dark-ON operation mode
Pre-wired with a 2-meter cable for flexible installation
Durable IP64-rated ABS housing

Technical Specification Matrix

Parameter	Value
Sensing Method	Retro-reflective with MSR function
Sensing Distance	100 mm to 6 m (using E39-R1); 100 mm to 10 m (using E39-R2)
Light Source	Red LED (624 nm)
Standard Sensing Object	Opaque: 75-mm dia. min. (E39-R1) / 100-mm dia. min. (E39-R2)
Power Supply Voltage	24 to 240 VDC ±10% / 24 to 240 VAC ±10%, 50/60 Hz
Power Consumption	2 W max. (DC) / 2 W max. (AC)
Output Configuration	Relay output SPDT, 250 VAC, 3 A max.
Response Time	20 ms max.
Ambient Temperature	Operating: -25°C to 55°C / Storage: -40°C to 70°C
Degree of Protection	IEC 60529 IP64
Material	ABS (Housing)
Connection Method	Pre-wired, 2m cable length

Industrial Applications

1. Conveyor Belt Packaging Line Object Detection

Utilizing the E3JK-RR12-C sensor for counting and detecting large opaque packages on high-speed industrial conveyor systems.

Problem Solved

Eliminates missed counts of variable-sized boxes; the retro-reflective setup with MSR prevents optical crosstalk and interference from adjacent sensors on dense, parallel conveyor routing. The universal 24-240V AC/DC power tolerance eliminates the need for separate low-voltage DC power supplies on legacy conveyors.

Retro-reflective sensingMutual interference prevention (MSR)24-240V AC/DCRelay Output

2. Automated Warehouse Gate and Roll-Up Door Obstacle Detection

Mounted across commercial roll-up doors or automated warehouse gates to reliably detect vehicles, forklifts, or personnel passing through the threshold.

Problem Solved

Ensures facility safety by signaling automated doors to stop or reverse when an obstacle breaks the sensing beam. Its IP64 ABS housing tolerates semi-outdoor, dusty conditions, while the 6m to 10m sensing range easily spans standard commercial entryways.

IP64 Protection100mm to 10m rangeOpaque body detectionAmbient sunlight immunity

3. Automated Storage and Retrieval System (AS/RS) Pallet Verification

Installed on stacker cranes to verify the physical presence, overhang, and correct positioning of inventory pallets in racking before deposit or retrieval.

Problem Solved

The built-in MSR function prevents critical crosstalk between sensors on adjacent multi-bay crane lifts. The SPDT robust relay output allows direct 240VAC interfacing to heavy-duty PLC cabinets common in legacy warehouse hardware without requiring step-down transformers.

MSR functionRed LED (624 nm)SPDT Relay output20 ms response time