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11L 氮氧化物NO+NO2检测管 Nitrogen oxides11L 氮氧化物NO+NO2检测管 Nitrogen oxides，Measuring Range 0.04 to 0.08 ppm 0.08 to 0.2 ppm 0.2 to 5.0 ppm 5.0 to 16.5 ppm，
详情介绍：
氮氧化物检测管11L Nitrogen oxides
Nitrogen oxides No.11L
NO+NO2
| Performance |
MeasuringRange | 0.04 to 0.08ppm | 0.08 to 0.2ppm | 0.2 to 5.0 ppm | 5.0 to 16.5ppm |
Number of Pump Strokes | 8 | 4 | 2 | 1 |
CorrectionFactor | 0.2 | 0.4 | 1 | 3.3 |
SamplingTime | 2 minutes per pumpstroke | |||
DetectingLimit | 0.01ppm(n=8) | |||
ColorChange | White → Yellowishorange | |||
ReactionPrinciple | NO + Cr6++ H2SO4→NO2 | |||
| Coefficient ofVariation | 10% (for0.2 to 1 ppm), 5% (for 1 to 5 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 |
Chlorine,Bromine, | - | Plus error | Produce similarstain |
Sulfurdioxide | 25 ppm | Minus error | Nodiscoloration |
Hydrogensulfide | 25 ppm | Minus error | Nodiscoloration |
| Othersubstance measurable with this detector tube |
| Calibration gasgeneration | NO2:Permeation tube method NO:High pressure gas cylinder method | |
| TLV-TWA | TLV-STEL | Explosive range |
| NO2:3ppm NO:25ppm | NO2:5ppm | - |