Gastec 3L アンモニアクイック測定検出器チューブ NH3
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Indicator: 2 to 30 ppm
Measuring Range:
+ 0.5 to1 ppm, Number of Pump Strokes 2
+ 1 to 30 ppm, Number of Pump Strokes 1
+ 30 to 78 ppm, Number of Pump Strokes 1/2
Sampling Time: 45 seconds per pump stroke
Colour Change: Pink → Yellow
Reaction Principle: 2NH3 + H2SO4 → (NH4)2SO4
Coefficient of Variation: 10% ( 1 ~ 10 ppm), 5% (10 ~ 30 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Performance
| Measuring Range |
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| Number of Pump Strokes |
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| Correction Factor |
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| Sampling Time | 45 seconds per pump stroke | |||
| Detecting Limit | 0.2 ppm (n=2) | |||
| Colour Change | Pink → Yellow | |||
| Reaction Principle | 2NH3 + H2SO4 → (NH4)2SO4 | |||
| Coefficient of Variation | 10% (for 1 to 10 ppm), 5% (for 10 to 30 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 |
| Carbon dioxide | 1% |  |
No |
| Hydrazine | + | Yellow | |
| Amines | 1/15 | + | Yellow ( 5 ppm) |
| Calibration gas generation | Permeation tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 25 ppm(2014) | 35 ppm(2014) | 15 to 28% |
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