5 pcs IR Flame Sensor Module Detector Smartsense For Detecting Flame Features: Can detect a flame or the light of 760~ 1100nm wavelength, lighter flame test distance of 80cm, for the greater flame, the farther the distance test. The detection angle is about 60 degrees, particularly sensitive to the flame spectrum. Sensitivity is adjustable (shown in blue digital potentiometer adjustment). Comparator output, signal clean, good waveform, strong driving ability, more than 15mA. With adjustable precision potentiometer for sensitivity adjustment. With fixed bolt holes for easy installation. Specifications: The working voltage: 3.3V-5V Length: 4.5cm / 1.77in Weight: 4g Wiring instructions: Product wiring description: VCC: 3.3-5V power supply "+" GND: power supply "-" DO:  TTL switch signal output. Instructions for use: 1. the flame sensor is most sensitive to flame, for ordinary light, it is also responsive , generally used as a flame alarm purposes. 2. the output interface can be directly connected to the micro-controller IO port. 3. The sensor must be kept at a distance from the flame to avoid damage to the sensor. lighter flame test distance of 80cm, for the greater flame, the farther the distance test 4. Analog output and the AD conversion process, can achieve higher accuracy Package included: 5 x  IR Flame Sensor Module