KY-026 Flame Sensor Module | IR Fire Detection Sensor | Adjustable Flame Detector Module with Analog & Digital Output for Arduino, ESP8266, ESP32, Raspberry Pi & DIY Electronics Projects

The KY-026 Flame Sensor Module is a highly sensitive infrared (IR) flame detection module designed to detect fire and open flames by sensing infrared light emitted in the 760nm to 1100nm wavelength range. Featuring both analog (AO) and digital (DO) outputs, this module is ideal for fire alarm systems, flame monitoring, robotics, industrial safety systems, and Arduino-based automation projects.

The onboard LM393 voltage comparator allows adjustable sensitivity using the built-in potentiometer, enabling accurate flame detection according to application requirements. When a flame is detected, the digital output changes state and the onboard LED indicates detection, making it easy to integrate into embedded systems.

Its compact PCB design and standard 4-pin interface make it compatible with popular development boards including Arduino Uno, Nano, Mega, ESP8266 NodeMCU, ESP32, Raspberry Pi (via ADC for analog reading), STM32, and other microcontroller platforms.

Whether you're building a smart fire alarm, firefighting robot, industrial monitoring system, or educational electronics project, the KY-026 Flame Sensor Module offers reliable flame detection with easy interfacing.

Specifications

• Product Type: Flame Sensor Module
• Model: KY-026
• Sensor Type: Infrared (IR) Flame Sensor
• Comparator IC: LM393
• Operating Voltage: 3.3V – 5V DC
• Operating Current: Typically 15mA
• Detection Wavelength: 760nm – 1100nm
• Detection Angle: Approximately 60°
• Detection Distance: Up to 80cm (depends on flame size and environment)
• Outputs:
  • Analog Output (AO)
  • Digital Output (DO)
• Digital Output Logic: TTL Compatible
• Sensitivity Adjustment: Onboard Potentiometer
• Detection Indicator: LED
• Power Indicator: LED
• Interface: 4-Pin Header (VCC, GND, AO, DO)
• PCB Material: FR4
• Compact Module Design
• Low Power Consumption
• Fast Response Time
• Easy to Interface with Microcontrollers

Pin Configuration

• VCC – Power Supply (3.3V–5V)
• GND – Ground
• AO – Analog Output
• DO – Digital Output

Features

• Detects fire and open flame using infrared light
• Adjustable sensitivity via onboard potentiometer
• Analog and digital outputs available
• Built-in LM393 comparator circuit
• High detection sensitivity
• LED indication for power and flame detection
• Compact and lightweight module
• Suitable for indoor flame monitoring
• Easy integration with Arduino, ESP32, ESP8266, and Raspberry Pi
• Reliable performance for DIY and industrial applications

Applications

• Fire Alarm Systems
• Flame Detection Projects
• Firefighting Robots
• Arduino Projects
• ESP32 Projects
• ESP8266 NodeMCU Projects
• Raspberry Pi Projects
• Smart Home Automation
• Industrial Fire Monitoring
• Safety Monitoring Systems
• Embedded Systems
• Robotics
• IoT Fire Detection
• Educational Electronics Kits
• DIY Electronics Projects
• Laboratory Experiments
• Automation Systems