Parallax QTI Light Sensor

ParallaxSKU: RB-Plx-74
Manufacturer #: 555-27401

Price  :
Sale price $14.43


  • Capable of analog or digital outputs
  • Unfocused for sensing diffused surfaces
  • Easily interface with any Parallax microcontroller
  • RoHS Compliant

The Parallax QTI Light Sensor uses a QRD1114 infrared (IR) reflective sensor determine the reflectivity of the surface below it. For instance when the QTI sensor is over a dark surface, the reflectivity is very low and when the QTI is over a light surface, the reflectivity is very high. The QTI Sensors were originally meant to sense the outer rim of a SumoBot® ring; however these little line sensors can be very handy for other applications, including line following and maze navigation.


  • Capable of analog or digital outputs
  • No contact surface sensing
  • Unfocused for sensing diffused surfaces
  • Daylight filter on sensor
  • Easy to interface with any Parallax microcontroller




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