WSE4SL-3N1137 from SICK, Inc. is a SENSOR THROUGH-BEAM 60M NPN
WL4SL-3F3234 from SICK, Inc. is a SENSOR RETROREFLECTIVE 12M PNP
WL4SL-3P3232 from SICK, Inc. is a SENSOR RETROREFLECTIVE 12M PNP
WTB4SL-3P3261 from SICK, Inc. is a SENSOR PROXIMITY 300MM PNP
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