Feature:1. Photoelectric switches, also known as photoelectric sensors, are mainly used in machine tools, metallurgy, chemicals, automatic doors, garages, etc.2. Can be used with programming controllers, microcontrollers, non-gate electronic counters, small relays, etc.3. Built-in LED chip for longer service life.4. Built-in sensor chip, more sensitive to detect metal objects.5. Standard line length is 1.1 meters, thick cable line, outer layer PVC flame retardant, durable, strong conductivity.Specification:Item Type: Photoelectric Sensor SwitchBrand: JYIOModel: E3F-DS30C4Power Supply Voltage: 10-30VDCOutput Current: 200mADetection Distance: 30cm 10% (Note That The Unit Here is Centimeter!)Opening Size: 18mmPower Cord Length: 1.1 MetersOutput Form: DC Three-Wire Normally Open NPN NODetecting Objects: Opaque ObjectsDetection Method: Diffuse ReflectionWorking Environment Temperature: -30-+65CCable Wire Wrapping Material: PVCHead Material: ABS.Package List:10 x Photoelectric Sensor SwitchNote:Please allow slight error due to manual measurement. Thanks for your understanding.