5mm IR Flame Sensor Phototransistor – Fire Detection Sensor

Build Smarter Flame Detection & Robotics Projects

The 5mm IR Flame Sensor Phototransistor is a compact infrared-sensitive electronic component commonly used in flame-detection experiments, robotics projects, Arduino applications, and STEM education.

Flames produce visible and infrared radiation. When used with an appropriate electronic circuit, this phototransistor can detect changes in infrared radiation and provide an electrical response that can be processed by a microcontroller or other control circuit.

This makes it a popular component for building projects such as autonomous firefighting robots, experimental flame detectors, automated alarm systems, and sensor-based robotics applications.

Its standard 5mm through-hole package makes it easy to use with breadboards, prototype boards, and custom PCBs. With a simple two-pin design, it is an excellent choice for students, hobbyists, makers, robotics teams, and educators exploring infrared sensing and automation.

Whether you are building your first Arduino sensor project or developing a robotics prototype, this compact sensor helps you explore how machines can detect environmental conditions and respond automatically.