| Part Number | E3T-SL21 |
| Shape | Square type |
| Sensing method | Limited Reflective |
| Sensing distance | White paper 50 x 50 mm: 5 to 30 mm |
| Minimum sensing object | 0.15 mm min. dia. (sensing distance: 10 mm) |
| Differential distance | 6 mm max. |
| Light source | Red LED (650 nm) |
| Power supply voltage | 12 to 24 VDC±10% ripple (p-p) 10% max. |
| Current consumption | 20 mA max. |
| Control output | NPN open collector 26.4 VDC max. 50 mA max. Residual voltage: 1 V max. (Load current Less than 10 mA) Residual voltage: 2 V max. (Load current 10 to 50 mA) |
| Operation mode | Light-ON |
| Protective circuit | Output short-cut protection, Output reverse polarity protection, Power supply reverse polarity protection |
| Response time | Operate or reset: 1 ms max. |
| Ambient illuminance | Incandescent lamp: 5,000 lx max. Sunlight: 10,000 lx max. |
| Ambient temperature range (Operating) | -25 to 55 °C (with no freezing or condensation) |
| Ambient temperature range (Storage) | -40 to 70 C (with no freezing or condensation) |
| Ambient humidity range (Operating) | 35 to 85 % (with no condensation) |
| Ambient humidity range (Strage) | 35 to 85 % (with no condensation) |
