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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. Sensitivity is adjustable (shown in blue digital potentiometer adjustment). The detection angle is about 60 degrees, particularly sensitive to the flame spectrum. Flame detection sensor 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.