Infrared Reflection Photoelectric Sensor (Proximity) E18-D80PK 5V 3:30cm

From the shop's description

The E18-D80PK adjustable IR Infrared Proximity Sensor Switch features an IR sensor that can measure distance between 3 to 30 cm. It features an easy to mount chassis, making prototyping much simpler. Specification: Diffuse reflective type Light source: Infrared Sensing range: 3cm to 30cm (depends on obstacle surface) Input voltage: 5VDC Current consumption: 100mA NPN output Dimension: 1.7cm (D) x 5cm (L) Wire Connection Brown wire: +5V Blue wire: GND Black wire: signal