The Flame Sensor Module is an infrared (IR) flame detection sensor designed to detect flames and fire sources by sensing infrared light in the 760–1100 nm wavelength range. It features an LM393 voltage comparator, adjustable sensitivity, and both digital (DO) and analog (AO) outputs, making it ideal for Arduino, ESP32, Raspberry Pi, robotics, fire alarm systems, and DIY electronics projects.
Features
- Full Name: IR Flame Detection Sensor Module
- Detects infrared light emitted by flames
- Adjustable detection sensitivity
- Digital and analog outputs
- Onboard LM393 comparator
- Power and detection status LEDs
- Compact PCB design
- Easy interface with microcontrollers
Specifications
| Specification | Value |
|---|---|
| Product Type | Flame Sensor Module |
| Sensor Type | Infrared Flame Sensor |
| Comparator IC | LM393 |
| Operating Voltage | 3.3V – 5V DC |
| Operating Current | ≤20 mA |
| Detection Angle | Approx. 60° |
| Detection Distance | Up to 100 cm (Depends on Flame Size & Environment) |
| Detection Wavelength | 760 – 1100 nm |
| Output Type | Digital (DO) and Analog (AO) |
| Sensitivity Adjustment | Yes (Onboard Potentiometer) |
| Operating Temperature | -25°C to +85°C |
Pin Configuration
| Pin | Description |
|---|---|
| VCC | Power Supply (3.3V–5V) |
| GND | Ground |
| DO | Digital Output |
| AO | Analog Output |
Note: The digital output (DO) changes state when the detected flame intensity exceeds the threshold set using the onboard potentiometer. The analog output (AO) provides a variable voltage corresponding to the detected infrared intensity.
Applications
- Fire detection systems
- Flame alarm systems
- Arduino projects
- ESP32 and Raspberry Pi projects
- Robotics
- Industrial safety systems
- Smart home automation
- Educational electronics
- DIY electronics projects
Advantages
- Fast flame detection
- Adjustable sensitivity
- Dual analog and digital outputs
- Low power consumption
- Easy microcontroller interface
- Compact and lightweight
- Cost-effective solution
Size
| Specification | Value |
|---|---|
| PCB Dimensions | Approx. 32 × 14 × 8 mm |
| Mounting Hole Diameter | Approx. 3 mm |
| Weight | Approx. 4 g |
Package Includes
- 1 × Flame Sensor Module
Note: This module detects infrared radiation from flames and is not a certified fire safety device. Detection performance can be affected by direct sunlight, incandescent lamps, and other strong infrared sources. For critical fire protection applications, use certified fire detection equipment.






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