| Part Number | E2S-W21 |
| Sensing head size | 8 mm x 7.4 mm x 20 mm |
| Type | Square type, Unshielded |
| Power source | DC 2-wire models |
| Sensing distance | 2.5 mm ±15% |
| Setting distance | 0 to 1.9 mm |
| Differential distance | 10% max. of sensing distance |
| Sensing object | Ferrous metal (Sensitivity lowers with non-ferrous metals.) |
| Standard sensing object | Iron 15 x 15 x 1 mm |
| Response frequency | 1 kHz (Average value) |
| Power supply voltage | 12 to 24 VDC ripple (p-p) 10% max. |
| Operating voltage range | 10 to 30 VDC |
| Leakage current | 0.8 mA max. |
| Control output (Switching capacity) | 3 to 50 mA |
| Control output (Residual voltage) | 3 V max. (Load current 50 mA with cable length of 1 m) |
| Indicator | Operation indicator (orange), Operation setting indicator (green) |
| Operation mode | NO |
| Protective circuit | Power supply reverse polarity protection Surge suppressor |
| Ambient temperature (Operating) | -25 to 70 °C |
