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Home › Optical smoke detection according to the two-color principle by means of a light emitting diode with an LED chip for light emission and with a light converter for converting part of the emitted light into light of longer wavelength

Optical smoke detection according to the two-color principle by means of a light emitting diode with an LED chip for light emission and with a light converter for converting part of the emitted light into light of longer wavelength

US Patent 10885757 · Granted Jan 5, 2021

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