Product DescriptionSize: Flame Sensor Relay Module1, can detect the flame or the wavelength at 760 nm to 1100 nm range of the light source, the test flame lighters distance of 80cm, the larger the flame, the greater the distance test2, the detection angle of 60 degrees, the flame spectrum particularly sensitive3, sensitivity adjustable (shown in blue digital potentiometer adjustment) 4, the comparator output is directly trigger the relay5, external dimensions: 50x26mm, thickness 19mm, with fixed bolt hole for easy installation6, the output bluish Terminal Block Terminal convenient