Gastec 114 가스 검지관 1- 부탄올 CH3CH2CH2CH2OH (10 ~ 150 ppm)
Model114
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Indicator: 10 ~ 150 ppm
Measuring Range: 10 ~ 150 ppm, Number of Pump Strokes 3
Sampling Time: 2 minutes per pump stroke
Colour Change: Yellow → Pale blue
Reaction Principle: CH3(CH2)3OH + Cr6++ H3PO4 → Cr3+
Coefficient of Variation: 15% (for 2.5 to 30 ppm), 10% (for 30 to 150 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Performance
| Measuring Range | 10 to 150 ppm |
| Number of Pump Strokes | 3 |
| Correction Factor | 1 |
| Sampling Time | 2 minutes per pump stroke |
| Detecting Limit | 1 ppm (n=3) |
| Colour Change | Yellow → Pale blue |
| Reaction Principle | CH3(CH2)3OH + Cr6++ H3PO4 → Cr3+ |
| Coefficient of Variation | 15% (for 2.5 to 30 ppm), 10% (for 30 to 150 ppm) |
| Shelf Life | 3 Years |
| Corrections for temperature & humidity | Temperature correction is necessary |
| Store the tubes at cool and dark place. | |
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Alcohols | + | Pale blue |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 20ppm | - | 1.4 to 11.2% |
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