Module with a reflective infrared sensor TCRT5000 with a potentiometer for calibration

Reflective sensor with digital output, enabling obstacle detection, with adjustable trigger threshold using a built-in potentiometer. The module can be connected directly to a microcontroller and development kits such as Arduino, Raspberry Pi, STM32 or ESP32

TCRT5000 Infrared Tracking Sensor Module, RoHS

Reflective Optical Sensor with Transistor Output, Vishay, RoHS

A small module with QRE1113GR reflective sensor. The sensor is made of IR LED and phototransistor IR. With its help, it is possible to determine the brightness of the position over which it is located, it can be used, for example, to detect a black line in Linefollower robots. SparkFun ROB-09453

ROB-09454 - QRE1113 Line Sensor Breakout - Digital

Matrix module of six reflection sensors for the Zumo robot. The module allows you to easily add line detection or edge detection to the robot. Pololu 1419

QTR-1A Reflectance Sensor (2-Pack)

QTR-1RC Reflectance Sensor (2-Pack)

QTR-3A Reflectance Sensor Array

QTR-3RC Reflectance Sensor Array

SEN-11769

SEN0017

SEN-13582

This module can be applied to intellectual robot, obstacle avoidance car, counter device in the pipeline, black and white lines tracking device. This infrared sensor contains two parts: an infrared transmitter and an infrared receiver. 

Module with a reflection sensor (line sensor) RS-06WD. The board is equipped with a Grove connector and communicates via a digital interface. Seeed Studio 101020172

Module with 7 QTR type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4207