Flame Sensor Overview

Learn about the Flame Sensor, its working principle, pinout, and applications in electronics projects.

Introduction to Flame Sensor

The **Flame Sensor** is an essential component used in various safety applications to detect the presence of fire. This sensor can detect infrared (IR) radiation emitted by flames, making it an ideal choice for fire detection systems. The sensor is commonly used in automatic fire alarm systems, safety circuits, and robotic fire-fighting projects. The sensor outputs a digital signal that can be easily interfaced with microcontrollers like Arduino.

Flame Sensor Pinout

Below is the pinout of the Flame Sensor:

Pinout Diagram

Working Principle of Flame Sensor

The Flame Sensor works by detecting infrared radiation emitted by flames. The sensor uses a photodiode or phototransistor to sense IR radiation in the wavelength range typically between 760nm to 1100nm. When the sensor detects the IR radiation from a flame, it sends a signal to the microcontroller via either the digital or analog output pin. The digital pin outputs a HIGH signal when a flame is detected, and a LOW signal when no flame is present. The analog pin provides a continuous signal whose voltage level increases as the intensity of the flame increases.

Applications of Flame Sensor

• Fire alarm systems for early detection of fire in buildings.
• Robotics for fire detection and automatic firefighting systems.
• Automated safety systems in industrial settings to prevent fires.
• Consumer electronics, such as fire detection in home appliances.
• Monitoring of flame intensity in combustion chambers of industrial burners.