| Series | 21M |
| Dimension | 15 x 51 x 42.5 mm |
| Interface | IO-Link 1.12x PNP/NPN/push-pull NO/NC |
| Input function | Reset counter |
| Principle of operation | Photoelectric sensor |
| Principle of optical operation | Diffuse sensor energetic; diffuse sensor with background suppression; retroreflective sensor; through-beam sensor (emitter); through-beam sensor (receiver), depends on setting |
| Special optical feature | Multifunction |
| Beam characteristic | Divergent |
| Light type | LED Red light |
| Light spot size | Ø 50 mm at 1 m |
| Range | Adjustable |
| Connection | Connector, M12x1-Male, 4-pin |
| Housing material | Zinc, Die casting, PaintedAluminum, Glass, PC |
| Material sensing surface | Glass, AR coated |
| Operating voltage Ub | 10…30 VDC |
| Approval/Conformity | CEUKCAcULusWEEE |
| Scope of delivery | User manual |