Request InfoWavelength ReferencesWavelength References offers its HCN-Mini fiber-coupled miniaturized hydrogen cyanide gas absorption cell. Designed for embedded OEM applications in harsh environments, the cells feature hard, sealed, glass gas tubes with a lifetime of >20 yr. The tubes are packaged in a metal housing and are fitted with single-mode fiber pigtails. All optics are coated and wedged for low backreflection and minimum interference. A built-in InGaAs photodiode can transform the output from optical to electrical. 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