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简单介绍：
四氢呋喃气体检测管159 Tetrahydrofuran，Measuring Range 20 to 50 ppm 50 to 800 ppm Number of Pump Strokes 2 1 Correction Factor四氢呋喃气体检测管159 Tetrahydrofuran C6H8O
详情介绍：
四氢呋喃气体检测管159 Tetrahydrofuran
Tetrahydrofuran No.159
C6H8O
| Performance |
MeasuringRange | 20 to 50 ppm | 50 to 800 ppm |
Number of PumpStrokes | 2 | 1 |
CorrectionFactor | 0.4 | 1 |
SamplingTime | 5 minutes per pumpstroke | |
DetectingLimit | 2 ppm (n=2) | |
ColorChange | Pink → PaleBlue | |
ReactionPrinciple | C4H8O + Cr6+ + H2SO4 → Cr3+ | |
| Coefficient ofVariation | 15% (for50 to 200 ppm), 10% (for 200 to 800 ppm) | |
| ShelfLife | 3Years | |
| Correctionsfor temperature & humidity | Temperature correction is necessary | |
| Store the tubes at cool and darkplace. | ||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Alcohols | - | Plus error | Produces pale bluestain. |
| Othersubstance measurable with this detector tube |
Substance | Correction Factor | Pump Strokes | Measuring Range |
1.4-Dioxane | by scale | 2 | 25to 140ppm |
| Calibration gasgeneration | Diffusion tube method | |
| TLV-TWA | TLV-STEL | Explosive range |
| 200ppm | 250ppm | 1.5to 12.4% |