| 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 | 
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