| Sensing method | Through beam |
| Model | NPN | PM18V-T20BNWR |
| PNP | PM18V-T20BPWR |
| Sensing distance | 20m (Adjustable) |
| Standard target | ＞Φ7mm（Opaque object） |
| Output mode | Light-ON/Dark-ON （Wire switching） |
| Light source | 640nm Red LED |
| Supply power | DC 12～24V ±10% ，impulse（P-P）＜10％ |
| Directivity angle | ＞2° |
| Residual voltage | ＜2V (Load Current：≤100mA) |
| Current consumption | Transmitter < 10 mA；Receiver < 10 mA |
| Load current | ≤100mA |
| Circuit protection | Power reverse direction connection protection |
| Response time | <1ms |
| Indicator light | Output LED：Orange LED、Power/stable： Green LED |
| Connection | Cable 2m（PVC） |
| Ambient temperature | Work:-25～+55℃；Store：-40～+70℃(No dew condensation or icing allowed) |
| Ambient humidity | Work：35～85%RH，Store：35～95%RH，（No dew condensation） |
| Ambient illumination | Sunlight:＜10,000Lx， lamplight:＜3,000Lx |
| Withstand voltage | 1000 VAC, 50/60 Hz, 1 min |
| Insolation resistance | ＞20MΩ（DC500V megger）between current-carrying parts and case |
| Anti-vibration | 10~55Hz double-amplitude 1.5mm X,Y,Z 2h |
| Anti-impact | 500m/S² X,Y,Z,directions for 3 times |
| Protection degree | IEC IP65 |
| Material | Housing | PBT+ABS |
| Lens mount | ABS |
| Lens | PMMA |