| Working voltage | 12~24 VAC/DC or 2x1.5 V LR6 AA battery |
| Working current (24VDC) | emiter: ≤8m A receiver: ≤40 mA |
| Photocell wavelength | 940 nm |
| Angle of opposite emission | ≤±5 |
| Receiver range | ≥12 m |
| Adjustable angle of internal rotation system | 0~180º |
| Working temperature | -20 ℃~+60 ℃ |
| Relay contact loading capacity | 1A/30 VDC |
| Waterproof grade | IP54 |
| Dimensions |
127*50*35 mm |
| Weight | 155 g |
| P51 user manual (EN) | download |