Gastec 3DL 수동형 Dosl 튜브 암모니아 NH3 검지관 (0.1 ~ 10ppm)
Model3DL
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Indicator: 1 to 10 ppm
Measuring Range: 0.1 to 10 ppm
Sampling Hours: 1 to 10 hours
Colour Change: Pink → Yellow
Reaction Principle: 2NH3 + H2SO4 → (NH4)2SO4
Coefficient of Variation: 10% (for 1 to 10 ppm-hr)
Nr. of tests: 10
Performance
| Measuring Range | 0.1 to 10 ppm |
| Sampling Hours | 1 to10 hours |
| Detecting Limit | 0.02 ppm (10 hours) |
| Colour Change | Pink → Yellow |
| Reaction Principle | 2NH3 + H2SO4 → (NH4)2SO4 |
| Coefficient of Variation | 10% (for 1 to 10 ppm-hr) |
| Shelf Life | 2 Years |
| Corrections for temperature & humidity | Temperature and Humidity 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 |
| Amines | + | Yellow | |
| Hydrazine | + | Yellow |
Other substance measurable with this detector tube
| Substance | Correction Factor | Sampling Time | Measuring Range |
| Methyl amine | 1.9 | 0.19 to 19 ppm | 1 to 10 hours |
| Trimethyl amine | 2.3 | 0.23 to 23 ppm | 1 to 10 hours |
| Calibration gas generation | Permeation tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 25 ppm | 35 ppm | 15 to 28% |
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