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关 键 词：一氧化碳检测管CO
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发布时间：2010-12-20
Carbon monoxide No.1DL CO Performance Measuring Range 0.4 to 400 ppm Sampling Hours 0.5 to 24 hours Detecting Limit 0.2 ppm (24 hours) Color Change Pale Yellow → Brown Reaction Principle CO + Na2Pd(SO3)2 → Pd + CO2 + SO2 + Na2SO3 Coefficient of Variation 10% (for 10 to 200 ppm-hr) Shelf Life 2 Year Corrections for temperature & humidity Unnecessary Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. Possible coexisting substances and their interferences (NOTE) Substance Concentration Interference Change color by itself Nitrogen dioxide 5 ppm Minus error No discoloration by itself Chlorine - No effect No discoloration by itself Hydrogen sulfide - Plus error Discolors reddish brown Calibration gas generation Diffusion tube method TLV-TWA TLV-STEL Explosive range 25 ppm - 12.5 to 74%
