| Detection method | Retro-reflective |
| Model | NPN
| PF31-R04BNOR | PF31-R04BNCR |
| PNP | PF31-R04BPOR | PF31-R04BPCR |
| Sensing distance | 4 m (with a 40 x 60 mm reflector) |
| Standard target | ＞Φ75mm（Opaque object） |
| Output mode |
| Dark-ON | Light-ON |
| Light source | 620nm Red LED |
| Supply power | DC 12～24V ±10% ，impulse（P-P）＜10％ |
| Directivity angle | 2~10° |
| Residual voltage | ＜2V (Load Current：≤100mA) |
| Current consumption | < 12mA |
| Load current | ≤100mA |
| Circuit protection | Power reverse indirection connection protection, short-circut protection |
| Response time | <1ms |
| Indicator light | Output LED:Orange LED、Power/stable: Green LED |
| Connection | Cable 2m |
| Ambient temperature | Work:-25～+55℃；Store：-30～+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 |
| Insulation resistance | ＞20MΩ（DC500V megger）between current-carring parts and case |
| Anti-vibration | 10~55Hz double-amplitude 1.5mmX,Y,Z 2h |
| Impact resistance | 500m/s² (X，Y，Z ，directions , 3 times) |
| Protection degree | IEC IP67 |
| Material | Housing | PBT |
| Lens | PMMA |