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projectfeatures Detection of gas concentration rangeH2S 0 ~ 100 PPM The output current500 + 100 na/PPM of H2S Repeat the reproducibilityLess than 2% + / - The reaction timeT90: less than 30 seconds Zero offsetLess than 1 PPM (-- 20 to 50 ) The temperature- 20 ~ + 50 humidity15 ~ 90% RH