The 4-PIN IR Flame Detection Sensor Module is designed to detect infrared light emitted by flames within the 760 nm – 1100 nm wavelength range. This compact and reliable module provides both Digital (TTL) and Analog outputs, making it suitable for a wide range of fire detection, safety, and automation projects.
An onboard adjustable sensitivity potentiometer allows fine-tuning of flame detection distance and sensitivity based on environmental conditions.
Key Features
Detects infrared radiation from open flames
Supports Digital (TTL) and Analog voltage outputs
Adjustable sensitivity via onboard potentiometer
Fast response time for real-time detection
Simple 4-pin interface for easy integration
Compact PCB design
Pin Configuration
VCC – 3.3V to 5V power input
GND – Ground
DO – Digital output (HIGH / LOW, threshold-based)
AO – Analog output (proportional flame intensity)
Technical Specifications
Detection Wavelength: 760 nm – 1100 nm
Detection Range: Up to ~0.8 m (standard lighter flame)
Detection Angle: Approx. 60°
Operating Voltage: 3.3V – 5V DC
Output Signals: Digital (TTL) + Analog
Response Time: < 100 ms
PCB Dimensions: Approx. 32 mm × 14 mm
Working Principle
The sensor detects infrared radiation produced by flames.
When the detected IR level exceeds the set threshold:
AO pin outputs a continuous analog voltage, allowing more precise flame intensity measurement via ADC.
Applications
Fire and flame detection systems
Smart home safety devices
Robotics and autonomous systems
Industrial safety monitoring
Arduino, ESP8266, ESP32, and Raspberry Pi projects
