OMRON歐姆龍光電傳感器E3S-GS3B4 General-purposeMiniatureSensorsShortresponsetime:3ms.EasyadjustmentofsensitivityandopticalaxiswithSTABILITYandLIGHTindicators.Wire-selectableoperationmode.Mutualinterferenceprotectivecircuiteliminatescrosstalk(reflectivesensoronly).