This is a photoelectric switch sensorDescriptionModel: E3F-DS30C1Power requirement:6-36VDCOutput current: 300mADetection distance:5-30cmOutput type: NPN 3-wires Normally OpenWiring: brown-Power+; blue-Power-; black-signalResponse frequency: 0.5KHZFeatures: Connections counter， industrial automationSize: As the picture showsAttention1. When the load is connected photoelectric switches is greater than 300mA， use a small relay conversion2. When the photoelectric switch is connected heavy load， but also need a small relayPacking IncludedA photoelectric switch sensor