During technical comparisons, E3RB-RP21 appears alongside Omron SMPS 24V 10A, E3Z D61 2M and Omron Sensors so engineers assess signal types, ingress protection, and ambient tolerances accurately.
Omron E3RB-RP21 Photoelectric Sensor
The Omron E3RB-RP21 Photoelectric Sensor features Retro-reflective with MSR function with a 0.1 to 3 m sensing range, and PNP output for accurate object detection. It operates on a 10–30 VDC power supply and connects via a durable M12 connector. This model is manufactured by Omron under the Omron Photoelectric Sensors category and belongs to the Omron E3RB Series. Equipped with a red LED (624 nm) light source, Light-ON/Dark-ON selectable wiring, 0.5 ms response time, 25 mA current consumption, and IP67/IP69K protection, it ensures reliable sensing performance in harsh industrial environments.
| Brand | Omron |
| Product Type | Photoelectric Sensor |
| Model Number | E3RB-RP21 |
Omron E3RB-RP21 Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Retro-reflective with MSR function |
| Sensing Distance | 0.1 to 3 m |
| Standard Sensing Object | Opaque: 75 mm dia.min. |
| Light Source | Red LED (624 nm) |
| Power Supply Voltage | 10 to 30 VDC (include voltage ripple of 10%(p-p) max.) |
| Output configuration | PNP |
| Connection Method | M12 Connector |
| Current Consumption | 25 mA max. |
| Control Output | Load current: 100 mA max. (Residual voltage: 2 V max.), Load power supply voltage: 30 VDC max. |
| Operation Mode | Light-ON/Dark-ON selectable by wiring |
| Response Time | 0.5 ms |
| Sensitivity Adjustment | One-turn adjuster |
| Indicators | Operation indicator (orange) Stability indicator (green) |
| Ambient Illumination | Incandescent lamp: 3,000 lx max./ Sunlight: 10,000 lx max. |
| Ambient Temperature Range | Operating: -25 to 55°C/ Storage: -40 to 70°C (with no icing or condensation) |
| Ambient Humidity Range | Operating: 35 to 85%/ Storage: 35 to 95% (with no condensation) |
| Insulation Resistance | 20 MΩ min. at 500 VDC |
| Dielectric Strength | 1,000 VAC at 50/60 Hz for 1 min. between current-carrying parts and case |
| Vibration Resistance | Destruction: 10 to 55 Hz, 1.5 mm double amplitude for 2 hours each in X, Y and Z directions |
| Shock Resistance | Destruction: 500 m/s2 3 times each in X, Y and Z directions |
| Protection Circuits | Power supply reverse polarity protection, Output short-circuit protection, and Output reverse polarity protection |
| Degree of Protection | IEC: IP67, DIN 40050-9: IP69K |
| Material | Nickel-brass, PMMA, POM, Nickel-brass |
| Weight | Approx. 50 g/ Approx. 20 g |
The Omron E3RB-RP21 Photoelectric Sensor is a retro-reflective type with MSR (Mutual Interference Suppression) function, PNP open collector output, and a polarized red LED light source. It operates within a 10 to 30 VDC power supply range and offers a sensing distance of up to 3 meters when paired with the recommended E39-R1S reflector. The model features a radial optical axis and nickel-plated metal housing for durability. Belonging to the Omron E3RB Series, it is ideal for precise sensing tasks in industrial automation systems across India.
Widely used in packaging, conveyor, and material handling systems, this sensor provides accurate detection regardless of object surface conditions. The MSR function ensures stability by preventing false detections caused by reflections from shiny surfaces. Its 0.5 ms fast response time supports high-speed production lines, while the single-turn sensitivity adjuster enables quick installation and fine-tuning. With IP67 and IP69K protection ratings, the sensor remains reliable in washdown environments, making it suitable for food, beverage, and assembly line automation applications.
The Omron E3RB-RP21 Photoelectric Sensor features a PNP output and a 3 m sensing range, suited for efficient detection in automation systems. For users requiring NPN output, the Omron E3RB-RN21 Photoelectric Sensor offers similar retro-reflective sensing with an MSR function and metal body. Those preferring a pre-wired configuration can select the Omron E3RB-RP11 2M Photoelectric Sensor, which comes with a 2 m cable. Alternatively, for diffuse-reflective applications that do not require a reflector, the Omron E3RB-DP21 Photoelectric Sensor provides a 100 mm sensing range with PNP output. The Omron E3RB-RP21 ensures consistent and reliable performance across diverse industrial environments.
Built for endurance, the Omron E3RB-RP21 Photoelectric Sensor delivers stable detection under harsh industrial conditions. With its IP69K protection level, 0.5 ms response speed, and radial optical design, it ensures precise operation even in variable temperatures from −25°C to 55°C. This model represents Omron’s engineering excellence within the E3RB Series, offering dependable sensing solutions that enhance productivity and reliability across India’s automation and manufacturing sectors.
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