ITEM NAME:E18-D50NK NPN Adjustable Infrared Reflectance Sensor Switch Photoelectric Sensor.E18-D50NK diffuse reflectance infrared obstacle avoidance sensor infrared photoelectric switch proximity switches NPN. 2 E18-D50NK NPN IR Infrared Reflectance Sensor for Arduino Sensor Shield. This is a set of transmitter and receiver in one of the photoelectric sensors.
