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硫化羰检测管21LA Carbonyl sulphide，Measuring Range 2 to 5 ppm 5 to 50 ppm 50 to 125 ppm Number of Pump Strokes 1 1 1/2 Correction Factor 0.4 1 2.5 Sampling Time 3 minutes，硫化羰检测管价格，碳酰硫化物，羰基硫化物检测管
详情介绍：
硫化羰检测管21LA Carbonyl sulphide
Carbonylsulphide No.21LA
COS
| Performance |
Measuring Range | 2 to 5ppm | 5 to 50ppm | 50 to 125ppm |
Number of Pump Strokes | 1 | 1 | 1/2 |
Correction Factor | 0.4 | 1 | 2.5 |
SamplingTime | 3 minutes per pumpstroke | ||
DetectingLimit | 0.8 ppm (n=2) | ||
ColorChange | Bluish Purple →White | ||
ReactionFormula | COS +I2O5 +H2SO4 →SO2 + CO2 | ||
| Coefficient ofVariation | 10% (for10 to 30 ppm), 5% (for 30 to 100 ppm) | ||
| ShelfLife | 2Years | ||
| Correctionsfor temperature & humidity | Temperaturecorrection is necessary | ||
| Store the tubes inthe refrigerator to keep at 10oC (50oF) orbelow. | |||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Carbonmonoxide | 500ppm | + | Black |
sulphur dioxide,Carbon disulphide | + | White | |
Carbondioxide |
| No | No |
Nitrogendioxide | 2 ppm | + | Brown |
| Hydrogen sulphide | 1000 ppm | + | White |
| Propane, Butane | 10% | No | Black at the top of the discolouredarea. |
*In case the primary tube is totallydiscolours, analyzer tube will give white discolouration byhydrogen sulphide.
| Calibration gasgeneration | High pressure gascylinder method | |
| TLV-TWA | TLV-STEL | Explosive range |
| - | - | 12 to 19% |