Gastec 3H Quick-measuring Detector tubes Ammonia NH3 (0.2~32%)
ManufacturerGastec(View more products from this manufacturer)
Model3H
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Indicator: 1 to 16%
Measuring Range:
+ 0.2 to 1%, Number of Pump Strokes 5 - 2
+ 1 to 16%, Number of Pump Strokes 1
+ 16 to 32%, Number of Pump Strokes 1/2
Sampling Time: 45 seconds per pump stroke
Colour Change: Purple → Yellow
Reaction Principle: 3NH3 + H3PO4 → (NH4)3PO4
Coefficient of Variation: 10% (for 1 to 4 %), 5% (for 4 to 16 %)
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 | 0.05% (n=5) | |||
| Colour Change | Purple → Yellow | |||
| Reaction Principle | 3NH3 + H3PO4 → (NH4)3PO4 | |||
| Coefficient of Variation | 10% (for 1 to 4 %), 5% (for 4 to 16 %) | |||
| 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 |
| Hydrazine | + | Yellow | |
| Amines other than aromatic amines | + | Yellow |
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