E3T-ST11R,SIDE THRU-B NPN LIGHT-ON ROBOTIC
E3T-ST12,OPTO SENSOR XMITTER/RCVR 1METER
E3T-ST12 5M,1M THRU-BEAM DARK-ON NPN 5M
E3T-ST12..,
E3TST122M,
E3T-ST12-D,RECEIVER ONLY, SIDE MOUNT 2M C
E3T-ST12F 2M,1M IR T-BEAM D/ON NPN
