Pololu QTR-1A Reflectance Sensor – Analog IR Line Sensor (2 Pack)

QAR 25.00/ unit

Description

The Pololu QTR-1A Reflectance Sensor is a compact infrared reflectance module designed for line detection, edge sensing, and short-range proximity measurement. It integrates an IR LED and phototransistor that produce an analog voltage proportional to reflected light intensity. Operating at 5 V with a typical current consumption of 17 mA, the sensor delivers reliable readings for high-contrast surface detection. Its small 12.7 × 7.6 mm footprint allows installation in dense arrays, making it suitable for robotics, automation, and embedded sensing applications. Features • Infrared LED and phototransistor reflectance sensing pair • Analog voltage output proportional to reflected IR light • 5 V operating voltage compatible with microcontrollers • Typical current consumption around 17 mA • High sensitivity for line detection and contrast sensing • Optimal sensing distance around 3 mm • Maximum recommended detection distance up to 6 mm • Compact 12.7 × 7.6 mm PCB for dense sensor arrays • Integrated current-limiting resistor for safe LED operation • Suitable for line follower and edge detection robots • Direct interface with analog inputs on Arduino boards • Supplied as 2 sensors per package Pololu QTR Reflectance Sensor Application Note   (pdf) • Datasheet of Fairchild's QRE1113GR sensor   (pdf) • 3D model from grabcad.com • Pololu AVR library • Arduino library Tutorials • Pololu QTR-1A Reflectance Sensor Tutorial • Sensor Qtr1a-Pololu