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 Switch Brand: JYIO® Model: E3F-DS30C4 Power Supply Voltage: 10-30VDC Output Current: 200mA Detection Distance: 30cm ± 10% (Note That The Unit Here is Centimeter!) Opening Size: 18mm Power Cord Length: 1.1 Meters Output Form: DC Three-Wire Normally Open NPN NO Detecting Objects: Opaque Objects Detection Method: Diffuse Reflection Working Environment Temperature: -30-+65°C Cable Wire Wrapping Material: PVC Head Material: ABS. Package List: 10 x Photoelectric Sensor Switch Note: Please allow slight error due to manual measurement. Thanks for your understanding.