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QTI Sensor - Infrared Emitter/Receiver

555-27401: PARALLAX INC. View Larger Image
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PARALLAX INC.
Jameco Part no. 2109587
Manufacturer PARALLAX INC.
Manufacturer no. 555-27401
  RoHS compliant
   NCNR (Non-Cancelable, Non Returnable)
Catalog 121 , page 178
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$11.95

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QTI Sensor - Infrared Emitter/Receiver

Parallax 555-27401 QTI Sensor
The QTI Sensor is an infrared emitter/receiver that is able to differentiate between a dark surface (with low IR reflectivity) and a light surface (with high IR reflectivity). These little sensors can be very handy for line following, maze navigation, or sensing the outer rim of a SumoBot ring. Wiring options allow it to be used digitally for fast black/white line following, or as an analog sensor to detect different shades of gray. A daylight filter is built into the sensor.

What does QTI stand for?

    Q = Charge
    T = Transfer
    I = Infrared
When your microcontroller measures the time it takes for the QTI's capacitor to decay, it's measuring a rate of charge transfer through an infrared phototransistor. This rate indicates how much infrared is reflecting off a nearby surface.

Features

  • 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

Key Specifications

  • Power requirements: 5 VDC
  • Communication: Analog output of capacitor decay time depending on level of infrared reflectivity
  • Dimensions: 1.25 x 0.37 in (31.7 x 9.4 mm)
  • Operating temp range: -40 to +185 °F (-40 to +85 °C)

Downloads & Resources

QTI Line Sensor rev 1.0 (.pdf)



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