| LJK-1240S2NO LJK-1240N4NO LJK-1240S2PO LJK-1240N4PO |
| 检测距离 | 2mm | 4mm | ||
| 直流 (集体管) |
NPN 3/4线 |
常开 | LJK-1240S2NO | LJK-1240N4NO |
| 常闭 | LJK-1240S2NC | LJK-1240N4NC | ||
| 开＋闭 | LJK-1240S2ND | LJK-1240N4ND | ||
| PNP 3/4线 |
常开 | LJK-1240S2PO | LJK-1240N4PO | |
| 常闭 | LJK-1240S2PC | LJK-1240N4PC | ||
| 开＋闭 | LJK-1240S2PD | LJK-1240N4PD | ||
| 2线 | 常开 | LJK-1240S2TO | LJK-1240N4TO | |
| 常闭 | LJK-1240S2TC | LJK-1240N4TC | ||
| 交流2线 (可控硅) |
常开 | LJK-1240S2AO | LJK-1240N4AO | |
| 常闭 | LJK-1240S2AC | LJK-1240N4AC | ||
| 自由电源2线 | 常开 | |||