Description

The Flame Sensor Module is a simple and reliable fire detection sensor that detects the presence of an open flame or fire by sensing the infrared light emitted in the 760nm to 1100nm wavelength range. It provides both a digital output (flame detected / not detected) and an analog output (flame intensity level) — making it easy to integrate into fire alarm systems, safety robots, and smart home fire detection projects with Arduino and ESP32.

At just 59 BDT, the Flame Sensor Module is one of the most affordable and widely used safety sensors available in Bangladesh. Sensitivity is adjustable via the onboard potentiometer — making it adaptable to different environments and detection distances.

⭐ Key Features

🔥

Flame IR Detection

Detects 760–1100nm IR wavelength emitted by flames

📊

Digital + Analog Output

DO pin for detection trigger, AO pin for intensity level

🎛️

Adjustable Sensitivity

Onboard potentiometer to tune detection threshold

💡

LED Indicator

Onboard LED lights when flame is detected

📏

Up to 100cm Detection

Detects a candle flame from up to 1 metre distance

🔌

3.3V and 5V Compatible

Works with Arduino (5V) and ESP32 (3.3V) directly

🚀 What Can You Build With the Flame Sensor?

🚨

Fire Alarm System

Trigger buzzer or relay when flame is detected

🤖

Fire Fighting Robot

Detect flame direction and guide robot response

🏠

Smart Home Safety

IoT fire notification via WiFi or SMS alert

🔬

Lab Safety System

Automatic gas valve shut-off on flame detection

📚

Student Projects

IoT safety and automation university assignments

👤 Who Should Buy This?

🎓 Beginners

First safety sensor project — connects in 3 wires and works immediately with Arduino

📚 Students

Fire detection projects, IoT safety systems and embedded automation university assignments

⚙️ Engineers

Prototyping fire safety systems, gas leak detectors and industrial safety interlocks

🛠️ Hobbyists

DIY fire fighting robots, kitchen safety alarms and candle-triggered lighting systems

⚔️ Flame Sensor vs MQ-2 vs PIR Sensor — Which Detection Module Should You Use?

Choosing the right sensor for your safety project

Feature	THIS ITEM Flame Sensor IR Fire Detection	GAS SENSOR MQ-2 Smoke / Gas	MOTION PIR Sensor Motion Detection
Detects	Flame / fire IR light	Smoke, gas, LPG	Human movement
Preheat Needed	❌ No — instant	✅ 20 sec warmup	✅ 30–60 sec warmup
Analog Output	✅ Yes — intensity	✅ Yes — concentration	❌ Digital only
Detection Range	Up to 100cm	Room-level	Up to 7 metres
Best For	Fire & flame detection	Gas leak & smoke	Intruder & presence

🔧 Features & Specifications

Feature ⚙️	Details
🖥️ Product Type	Flame Sensor Module
🔥 Detection Wavelength	760nm – 1100nm (flame IR spectrum)
📏 Detection Range	Up to 100cm (candle flame)
📤 Output	Digital (DO) + Analog (AO)
🎛️ Sensitivity	Adjustable via onboard potentiometer
⚡ Operating Voltage	3.3V – 5V
💡 LED Indicator	Yes — lights on flame detection
🎯 Compatible With	Arduino Uno, Arduino Nano, ESP32, ESP8266

💻 Quick Start — Flame Detection Example

🔥

Flame Sensor Digital + Analog Read (Arduino)

#define FLAME_DO  7    // Digital output pin
#define FLAME_AO  A0   // Analog output pin
#define BUZZER    8    // Optional buzzer pin

void setup() {
  Serial.begin(9600);
  pinMode(FLAME_DO, INPUT);
  pinMode(BUZZER, OUTPUT);
}

void loop() {
  int digitalVal = digitalRead(FLAME_DO);
  int analogVal  = analogRead(FLAME_AO);

  Serial.print("Flame Intensity: ");
  Serial.println(analogVal);

  if (digitalVal == LOW) {  // LOW = flame detected
    Serial.println("🔥 FLAME DETECTED! ALERT!");
    digitalWrite(BUZZER, HIGH);
  } else {
    digitalWrite(BUZZER, LOW);
  }

  delay(200);
}

The digital output is LOW when flame is detected and HIGH when clear. Adjust the potentiometer on the module to set sensitivity distance.

❓ Frequently Asked Questions

❓ Does the flame sensor trigger on sunlight or other light sources?

It can — the flame sensor detects the infrared spectrum which overlaps slightly with sunlight and some halogen lights. To reduce false triggers, adjust the potentiometer to lower sensitivity and avoid pointing the sensor directly at strong light sources. Best used indoors away from direct sunlight.

❓ Should I use the digital or analog output?

Use the digital output (DO) for simple flame detected / not detected alerts — it gives a clean HIGH/LOW signal based on the sensitivity threshold set by the potentiometer. Use the analog output (AO) if you want to measure the intensity of the flame and react differently based on how strong it is.

❓ What is the Flame Sensor Module price in Bangladesh?

The Flame Sensor Module price in BD is 59 BDT from Dream RC — the best price in Bangladesh with fast delivery and Cash on Delivery nationwide.

🔗 Compatible Development Boards

Arduino Uno R3

The most beginner-friendly combination — connect the flame sensor to the Arduino Uno, wire a buzzer to another pin, and have a working fire alarm in under 10 minutes.

View Arduino Uno →

Arduino Nano

Building a compact fire alarm? The Arduino Nano is smaller than the Uno — fits inside tight enclosures for a neat standalone flame detection unit.

View Arduino Nano →

📦 Package Includes

📦

1 × Flame Sensor Module

Jumper wires not included