Flame Sensor Module

The Flame Sensor Module is a compact and reliable electronic sensor designed to detect the presence of fire or open flames by sensing the infrared (IR) radiation emitted by a flame. It is widely used in fire detection systems, safety alarms, industrial monitoring, robotics, smart home automation, and educational electronics projects. The module provides fast and accurate flame detection and can be easily interfaced with microcontrollers such as Arduino, ESP32, ESP8266, Raspberry Pi, STM32, PIC, AVR, NodeMCU, and PLC systems.

The module incorporates a high-sensitivity infrared photodiode along with an onboard comparator circuit to detect the characteristic infrared wavelengths produced by flames. When a flame is detected within the sensor's operating range, the module generates an output signal that can be used to activate alarms, trigger safety mechanisms, or initiate automated responses. An onboard potentiometer allows users to adjust the detection sensitivity according to the application, improving detection accuracy under different environmental conditions.

Its compact PCB design, low power consumption, quick response time, and stable performance make the Flame Sensor Module suitable for continuous monitoring applications. The module supports digital output for simple ON/OFF flame detection, while some versions also provide an analog output for measuring flame intensity. Built-in power and status LEDs simplify installation and troubleshooting during development and operation.

The Flame Sensor Module is an excellent choice for students, hobbyists, engineers, and industrial developers who require an affordable and dependable solution for flame detection in embedded systems and automation projects.

Working Principle

A flame emits infrared radiation primarily within the wavelength range of approximately 760 nm to 1100 nm. The infrared sensing element on the module detects this radiation and converts it into an electrical signal. This signal is processed by the onboard amplifier and comparator circuit, which compares it with a preset threshold value. If the detected infrared intensity exceeds the selected threshold, the module activates its output and indicates flame detection through the output pin and onboard indicator LED.

The onboard sensitivity adjustment potentiometer enables users to increase or decrease the detection threshold, allowing the sensor to operate effectively in different lighting conditions and at varying distances from the flame.

Key Features

Detects flames using infrared sensing technology.

Fast and reliable flame detection.

Operating voltage from 3.3V to 5V DC.

Adjustable detection sensitivity using onboard potentiometer.

Digital output for easy microcontroller interfacing.

Optional analog output on selected module versions.

Quick response with stable performance.

Built-in power and status indicator LEDs.

Compact PCB design for embedded applications.

Low power consumption.

Easy integration with Arduino, ESP32, Raspberry Pi, ESP8266, STM32, PIC, AVR, NodeMCU, and PLC systems.

Suitable for DIY, educational, industrial, and automation projects.

Technical Specifications

Sensor Type: Infrared Flame Sensor

Operating Voltage: 3.3V–5V DC

Detection Wavelength: 760–1100 nm

Detection Distance: Up to approximately 80 cm (depending on flame size and environment)

Detection Angle: Approximately 60°

Output Type: Digital Output (Some versions also provide Analog Output)

Sensitivity Adjustment: Onboard Potentiometer

Response Time: Fast

Status Indicators: Power LED and Detection LED

Operating Temperature: Suitable for standard indoor operating environments

Module Interface: VCC, GND, DO (and AO on supported versions)

Applications

Fire detection and warning systems.

Flame alarm systems.

Industrial burner monitoring.

Gas burner safety systems.

Smart home fire detection.

Robotics and autonomous fire-fighting robots.

Factory and warehouse safety monitoring.

Embedded automation systems.

IoT safety monitoring projects.

Educational electronics experiments.

DIY electronics and engineering projects.

Research and prototype development.