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一氧化碳气体检测管1L CO Carbon monoxide
Carbonmonoxide No.1L
CO
| Performance |
MeasuringRange | 2.5to25ppm | 25 to 1000 ppm | 1000 to 2000ppm |
Number of Pump Strokes | 2 to 10 | 1 | 1/2 |
CorrectionFactor | 1/2 to 1/10 | 1 | 2 |
SamplingTime | 1 minute per pumpstroke | ||
DetectingLimit | 1 ppm (n=10) | ||
ColorChange | Yellow → Blackishbrown | ||
ReactionPrinciple | CO +Na2Pd(SO3)2 → Pd + CO2 + SO2+Na2SO3 | ||
| Coefficient ofVariation | 10% (for25 to 300 ppm), 5% (for 300 to 1000 ppm) | ||
| ShelfLife | 3Years | ||
| Correctionsfor temperature & humidity | Unnecessary | ||
| Store the tubes at cool and darkplace. | |||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Acetylene | 1/50 time | Plus error | Discolors darkbrown |
Ethylene | 2000 ppm | No effect | Discolors whole layerto brown |
Hydrogen | 5000 ppm | Plus error | Dark brown (wholelayer)(1%) |
Sulfurdioxide | 1/10 time | Plus error | Discolors blackishbrown |
Nitrogendioxide | 40 ppm | Plus error | 60 ppmNO2 gives redstain |
Carbondisulfide | 1/50 time | Plus error | Discolors darkbrown |
Halogens | 1/5 time | Plus error | Discolors darkbrown |
Mercaptans | 1/5 time | Plus error | Discolors darkbrown |
Hydrogensulfide | 1/5 time | Plus error | Discolors darkbrown |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 25 ppm | - | 12.5 to 74% |