Reliable Line and Reflectance Sensing with QTR-1RC Reflectance Sensor 2-Pack

The QTR-1RC Reflectance Sensor 2-Pack is built for line sensing and surface detection in small robots and automation projects.

It also works well for edge detection, simple proximity tasks, and reflectance-based triggers.

Important: Reflectance readings vary with surface color, distance, and ambient light. Best results come from calibrating the sensor over the exact surface and standoff you plan to use.

Why you'll love it

No analog-to-digital converter (ADC) is required
Improved sensitivity over voltage-divider analog output
Parallel reading of multiple sensors is possible with most microcontrollers
Operating voltage: 5.0 V
Supply current: 17 mA
Output format: digital I/O-compatible signal that can be read as a timed high pulse

What you can build

A strong fit for line followers, edge detectors, tape tracking, surface sensing, and small robots that need fast reflectance feedback.

Technical specifications

Product	QTR-1RC Reflectance Sensor 2-Pack
Brand	Pololu
Category	Reflectance Sensor Array
Support	Official Pololu product search and support resources linked below