Flame Sensor

A flame sensor is a detector, designed to detect and respond to the presence of a flame or fire. This types of sensor can be used for detecting fire in a short range. You can able to find mostly accurate result upto about 3 feet of distance. This sensor is very sensitive to the IR wavelength at 760 nm ~ 1100 nm light. By adjusting the potentiometer you can set a predefined threshold level. If the sensing signal level is higher than the predefined threshold level, the module output pin (named as "D0") goes to LOW, where as the default status of D0 is HIGH.