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| PartNumber | E3A2-R3M4T | E3A2-R3M4 | E3A2-R3M4D |
| Description | Photoelectric Sensors Retro 3M w/ Timer Univers AC/DC supply | Photoelectric Sensors Retro 3M Relay Univers AC/DC supply | SENS RELAY-OUT TIMER 3M RETRO |
| Manufacturer | Omron | Omron | - |
| Product Category | Photoelectric Sensors | Photoelectric Sensors | - |
| RoHS | Y | Y | - |
| Sensing Method | Polarized Retroreflective | Polarized Retroreflective | - |
| Sensing Distance | 3 m | 3 m | - |
| Light Source | Pulse Modulated Infrared LED | Pulse Modulated Infrared LED | - |
| Amplifier Type | Plug In Outputs | Plug In Outputs | - |
| Connection Method | Screw Terminals | Screw Terminals | - |
| Output Configuration | Relay | Relay | - |
| Body Style | Rectangular | Rectangular | - |
| Features | Optional solid-state outputs | Optional solid-state outputs | - |
| Brand | Omron Automation and Safety | Omron Automation and Safety | - |
| Product Type | Photoelectric Sensors | Photoelectric Sensors | - |
| Factory Pack Quantity | 1 | 1 | - |
| Subcategory | Sensors | Sensors | - |
| Part # Aliases | 1386857 E3A2R3M4T | 4577061 E3A2R3M4 | - |