The five-channel flame sensor has a large detection range of more than 120 degrees. The range decreases as the distance rises; it may produce a digital signal (high and low) as well as an analog signal (voltage signal); it has five outputs. The detecting distance of the digital output may be adjusted. The sensitivity of the analog output can be changed. It's been Onboard It functioned on a 3.3V-9V power supply and is compatible with most SCM systems, having 3 M3 mounting holes for simple installation.

Specifications:

• 5-channel infrared flame sensor
• Voltage: 3.3 - 9V
• Outputs: Analog & Digital
• Detection range:> 120 degrees

Connections of the 5 Channels Flame Sensor Module with Arduino:

• GND pin of the sensor to GND pin of Arduino
• Vcc pin of the sensor to +5Volts (5V) pin of Arduino
•  we use A1 pin of sensor (also if you want you can use all analog pins) to A0 pin of Arduino

 Simple Arduino Code for the 5 Channels Flame Sensor Module :

const int sensorMin = 0;     // sensor minimum
const int sensorMax = 1024;  // sensor maximum

void setup() {
  Serial.begin(9600);  
}
void loop() {
  // read the sensor on analog A0:
int sensorReading = analogRead(A0);
int range = map(sensorReading, sensorMin, sensorMax, 0, 3);
  
  // range value:
  switch (range) {
  case 0:    //No fire detected 
    Serial.println("** Νο Fire **");
    break;
  case 1:    // A fire between 1-3 feet away.
    Serial.println("** Fire **");

  }
  delay(1000); 
}