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18121126516
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氟化氢气体检测管17 Hydrogen fluoride
Hydrogen fluoride No.17
HF
| Performance |
MeasuringRange | 0.25to 0.5ppm | 0.5 to 20 ppm | 20 to 100 ppm |
Number of Pump Strokes | 7 | 4 | 1 |
CorrectionFactor | 1/2 | 1 | 5 |
SamplingTime | 45 seconds per pumpstroke | ||
DetectingLimit | 0.1ppm (n=7) | ||
ColorChange | Yellow → BrownishPink | ||
ReactionPrinciple | Hydrogen fluoridereacts with indicator to produce brownish pink colour. | ||
| Coefficient ofVariation | 10% (for 0.5 to 5ppm), 5% (for 5 to 20 ppm) | ||
| ShelfLife | 3Years | ||
| Correctionsfor temperature & humidity | Humidity correction is necessary | ||
| Store the tubes at cool and darkplace. | |||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Hydrogen chloride,Nitric acid | 1/5 time | Plus error | brownish pinkstain |
Chlorine, Nitrogendioxide | 1/10 time | Plus error | brownish pinkstain |
| Othersubstance measurable with this detector tube |
Substance | CorrectionFactor | PumpStroke | Temperature | AbsoluteHumidity | ColorChange |
Fluorine | 2.5 | 1 | 20oC(68oF) | 9 mg/l | Produces brownstain |
1.0 | 1 | 20oC(68oF) | 3mg/l |
| Calibration gasgeneration | Permeation tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| - | C3ppm | - |