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The sensor card that outputs the relay when it detects fire. It is ideal for projects like fire alarm, fire-extinguishing robot. It works with DC 12V. The light (flame) with a wavelength between 760nm and 1100nm can detect from a maximum of 80cm distance and 60 degrees angle. Its sensitivity can be adjusted through the potentiometer on it. 250V / 10A AC or 30V / 10A DC loads can be switched with the relay.