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| PartNumber | E3S-R2E4 | E3S-R2B42 2M | E3S-R2B4 |
| Description | Photoelectric Sensors PHOTOELECTRIC SENSOR | Photoelectric Sensors PHOTO RETRO | Photoelectric Sensors Light ON/Dark ON PNP 200cm 12-24V 3-Pin |
| Manufacturer | Omron | Omron | Omron |
| Product Category | Photoelectric Sensors | Photoelectric Sensors | Photoelectric Sensors |
| RoHS | Y | Y | Y |
| Sensing Distance | 2000 mm | - | 2 m |
| Output Configuration | NPN | - | PNP |
| Minimum Operating Temperature | - 25 C | - | - 25 C |
| Maximum Operating Temperature | + 55 C | - | + 55 C |
| Features | Light ON / Dark ON | - | - |
| Height | 32 mm | - | - |
| Length | 66.6 mm | - | - |
| Series | E3S | E3S | E3S |
| Width | 40 mm | - | - |
| Brand | Omron Automation and Safety | Omron Automation and Safety | Omron Automation and Safety |
| Operating Supply Voltage | 24 V | - | 24 V |
| Product Type | Photoelectric Sensors | Photoelectric Sensors | Photoelectric Sensors |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Sensors | Sensors | Sensors |
| Part # Aliases | E3SR2E4 | E3SR2B422M | E3SR2B4 |
| Sensing Method | - | - | Retroreflective |
| Light Source | - | - | Infrared LED |
| Connection Method | - | - | Prewired Cable |