How to Use KY-026 Flame Sensor: Examples, Pinouts, and Specs

The KY-026 Flame Sensor module is an electronic device capable of detecting fire or other light sources that emit wavelengths primarily in the range of 760nm to 1100nm. It is commonly used in safety systems for fire detection and can also serve in robotics and DIY projects where flame sensing is required. The module is sensitive to flame and other sources of infrared light, and it outputs a digital signal when a flame is detected.

• Fire alarm systems
• Firefighting robots
• Flame proximity detection
• Safety switches in industrial settings

• Operating Voltage: 3.3V to 5V
• Detection Wavelength: 760nm to 1100nm
• Digital Output: High when flame is detected (0V - Low, Vcc - High)
• Analog Output: Higher voltage as the flame intensity increases
• Detection Angle: Approximately 60 degrees
• Sensitivity: Adjustable via onboard potentiometer

1. Connect the Vcc pin to the 5V output on the Arduino UNO or the power supply.
2. Connect the GND pin to the ground on the Arduino UNO or the power supply.
3. Connect the A0 pin to an analog input on the Arduino UNO if you wish to measure the intensity of the flame.
4. Connect the D0 pin to a digital input on the Arduino UNO if you wish to detect the presence of a flame.

• Avoid exposing the sensor to bright lights or sunlight as it may trigger false alarms.
• Adjust the onboard potentiometer to set the threshold for the digital output.
• Use a pull-up or pull-down resistor on the digital output if necessary.
• Keep the sensor at a safe distance from flames to avoid damage.
• Test the sensor in the intended environment to calibrate and adjust sensitivity.

// KY-026 Flame Sensor Example Code
int flamePin = 2;    // Flame sensor digital output connected to digital pin 2
int flameDetected = LOW; // Variable to hold the flame detection status

void setup() {
  pinMode(flamePin, INPUT); // Set the flame sensor pin as input
  Serial.begin(9600);      // Start serial communication at 9600 baud rate
}

void loop() {
  flameDetected = digitalRead(flamePin); // Read the flame sensor output
  if (flameDetected == HIGH) {
    Serial.println("Flame detected!"); // If HIGH, flame is detected
  } else {
    Serial.println("No flame detected."); // If LOW, no flame is detected
  }
  delay(1000); // Wait for 1 second before the next read
}

• False Alarms: Adjust the sensitivity potentiometer to reduce false positives.
• No Response: Ensure the sensor is connected properly and receiving power.
• Inconsistent Readings: Avoid placing the sensor in environments with rapid temperature changes.

• If the sensor is not detecting flame, try decreasing the threshold by turning the potentiometer.
• Ensure there are no obstructions in front of the sensor that could block its view.
• Check all connections and ensure that the sensor is not damaged.

Q: Can the KY-026 Flame Sensor detect smoke? A: No, the KY-026 is designed to detect flames and infrared light, not smoke.

Q: What is the range of detection for the KY-026 Flame Sensor? A: The sensor can detect flames within approximately 60 degrees of its field of view.

Q: How do I adjust the sensitivity of the sensor? A: Turn the onboard potentiometer clockwise to increase sensitivity and counterclockwise to decrease it.

Q: Can the sensor differentiate between different light sources? A: The sensor is designed to detect infrared light and may not differentiate between different IR light sources.

This documentation provides a comprehensive guide to using the KY-026 Flame Sensor module with an Arduino UNO. For further assistance, consult the manufacturer's datasheet or contact technical support.