一氧化碳?xì)怏w檢測(cè)管1LL Carbon monoxide
Carbonmonoxide LL
CO
Performance |
MeasuringRange | 5 to 50 ppm |
Number of PumpStrokes | 2 |
CorrectionFactor | 1 |
SamplingTime | 2 minutes per pumpstroke |
DetectingLimit | 1 ppm (n=2) |
ColorChange | Yellow → Blackishbrown |
ReactionPrinciple | CO +Na2Pd(SO3)2 → Pd + CO2 + SO2 + Na2SO3 |
Coefficient ofVariation | 15% (for 5 to 10ppm), 10% (for 10 to 50 ppm) |
ShelfLife | 3 Years |
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 | Produces dark brownstain |
Sulfurdioxide | 1/10 time | Plus error | Produces dark brownstain |
Nitrogendioxide | 40 ppm | Plus error | Produces redstain |
Hydrogensulfide | 1/5 time | Plus error | Produces dark brownstain |
Calibration gasgeneration | Diffusion tubemethod |
TLV-TWA | TLV-STEL | Explosive range |
25 ppm | - | 12.5 to 74% |