检测管内金属环形开关，环形光电传感器
型号有出线式跟接插件式之分：
I1PN-R0320P-O3U2，I1PN-R0320P-C3U2，I1PN-R0320N-O3U2，I1PN-R0320N-C3U2，I1PN-R0320P-OEU4，I1PN-R0320P-CEU4，I1PN-R0320N-OEU4，I1PN-R0320N-CEU4，
I1PN-R0320P-S4U2，I1PN-R0320PN-S4U2，I1PN-R0320P-SEU4，I1PN-R0320PN-SEU4
 
I1PN-R0520P-O3U2，I1PN-R0520P-C3U2，I1PN-R0520N-O3U2，I1PN-R0520N-C3U2，I1PN-R0520P-OEU4，I1PN-R0520P-CEU4，I1PN-R0520N-OEU4，I1PN-R0520N-CEU4，
I1PN-R0520P-S4U2，I1PN-R0520PN-S4U2，I1PN-R0520P-SEU4，I1PN-R0520PN-SEU4
 
I1PN-R0620P-O3U2，I1PN-R0620P-C3U2，I1PN-R0620N-O3U2，I1PN-R0620N-C3U2，I1PN-R0620P-OEU4，I1PN-R0620P-CEU4，I1PN-R0620N-OEU4，I1PN-R0620N-CEU4，
I1PN-R0620P-S4U2
 
I1PN-R0820P-O3U2，I1PN-R0820P-C3U2，I1PN-R0820N-O3U2，I1PN-R0820N-C3U2，

 
I1PN-R1020P-O3U2，I1PN-R1020P-C3U2，I1PN-R1020N-O3U2，I1PN-R1020N-C3U2
 
I1PN-R1220P-O3U2，I1PN-R1220P-C3U2，I1PN-R1220N-O3U2，I1PN-R1220N-C3U2，I1PN-R1220P-OEU4，I1PN-R1220P-CEU4，I1PN-R1220N-OEU4，I1PN-R1220N-CEU4，
I1PN-R1220P-S4U2，I1PN-R1220PN-S4U2，I1PN-R1220P-SEU4，I1PN-R1220PN-SEU4