Gastec 104 가스 검지관 부탄 C4H10 (25 ~ 1400 ppm)
Model104
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Indicator: 50 to 1400 ppm
Measuring Range: 25 to 1400 ppm, Number of Pump Strokes 1
Sampling Time: 3 minute per pump stroke
Colour Change: Orange → Dark Green
Reaction Principle: C4H10 + Cr6++ H2SO4 → Cr3+
Coefficient of Variation: 10% (for 25 to 400 ppm), 5% (for 400 to 1400 ppm)
Nr. of tests: 10
Pump: GV-100S/110Sc
Performance
| Measuring Range | 25 to 1400 ppm |
| Number of Pump Strokes | 1 |
| Correction Factor | 1 |
| Sampling Time | 3 minutes per pump stroke |
| Detecting Limit | 5 ppm (n=1) |
| Colour Change | Orange → Dark Green |
| Reaction Principle | C4H10 + Cr6++ H2SO4 → Cr3+ |
| Coefficient of Variation | 10% (for 25 to 400 ppm), 5% (for 400 to 1400 ppm) |
| Shelf Life | 3 Years |
| Corrections for temperature & humidity | Unnecessary |
| Store the tubes at cool and dark place. | |
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Organic solvents | + | Dark green |
Other substance measurable with this detector tube
| Substance | Correction Factor | No. of pump strokes | Measuring Range |
| Isobutane | Factor : 2.2 | 1 | 55 to 3080 ppm |
| Pentane | Factor : 1.2 | 1 | 30 to 1680 ppm |
| Calibration gas generation | Static gas dilution method |
| TLV-TWA | TLV-STEL | Explosive range |
| - | 1000 ppm (2014) | 1.6 to 8.5% |
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