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| PartNumber | E2S-W21B 5M | E2S-W21B 1M | E2S-W21B |
| Description | Proximity Sensors E2S-W21B W/ 5 METER CABLE | Proximity Sensors PROX SQ 2.5mm Front DC2W-NO AF | |
| Manufacturer | Omron | Omron | - |
| Product Category | Proximity Sensors | Proximity Sensors | - |
| RoHS | Y | Y | - |
| Sensing Method | Inductive | - | - |
| Sensing Distance | 2.5 mm | 2.5 mm | - |
| Mounting Style | Cable | - | - |
| Output Configuration | NPN-NO | - | - |
| Maximum Operating Temperature | + 70 C | - | - |
| Minimum Operating Temperature | - 25 C | - | - |
| Height | 7.4 mm | - | - |
| Length | 23 mm | - | - |
| Width | 7.8 mm | - | - |
| Barrel Size | 23 mm x 7.8 mm x 7.4 mm | - | - |
| Brand | Omron Automation and Safety | Omron Automation and Safety | - |
| Maximum Frequency | 1 kHz | - | - |
| Operating Supply Current | 50 mA | - | - |
| Operating Supply Voltage | 10 VDC to 30 VDC | - | - |
| Factory Pack Quantity | 1 | 1 | - |
| Supply Voltage Max | 30 VDC | - | - |
| Supply Voltage Min | 10 VDC | - | - |
| Part # Aliases | E2SW21B5M | E2SW21B1M | - |
| Unit Weight | 0.352740 oz | 0.352740 oz | - |
| Series | - | E2S | - |