KY-033 Line Tracking Sensor Module

The KY-033 Line Tracking Sensor Module is a compact infrared reflectance sensor designed for line-following and surface detection applications in Arduino and microcontroller-based projects. It works by emitting infrared light toward a surface and detecting the reflected signal — dark surfaces absorb the IR light while light surfaces reflect it, producing a digital output that indicates the detected surface type.

Perfect for hobbyists, students, and robotics enthusiasts, this module is widely used in line-following robots, edge detection systems, object proximity sensing, and automated guided vehicle projects. Its simple two-outcome digital output makes programming straightforward, even for beginners.

The KY-033 is fully compatible with standard Arduino sensor shields and requires no additional components for basic operation. An onboard sensitivity potentiometer allows fine-tuning of the detection threshold to suit different surface conditions and ambient lighting environments.

Specification:

• Operating Voltage : 3.3V – 5V DC
• Output Type : Digital
• Detection Method : Infrared reflectance
• Detection Distance : 1mm – 8mm
• Onboard Potentiometer : Yes, for sensitivity adjustment
• Onboard Indicator : LED signal indicator
• PCB Color : Blue
• Compatibility : Arduino, Raspberry Pi, ESP32
• Module Dimensions : 32mm x 14mm