Gastec 185 Quick-measuring Detector tubes Hydrazine N2H4 (0.05~2 ppm)
ManufacturerGastec(View more products from this manufacturer)
Model185
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Indicator: 0.1 to 2.0 ppm
Measuring Range:
+ 0.05 to 0.1 ppm, Number of Pump Strokes 10
+ 0.1 to 2.0 ppm, Number of Pump Strokes 5
Sampling Time: 1 minute per pump stroke
Colour Change: Pink → Yellow
Reaction Principle: N2H4 + H2SO4 → (NH3)2SO4
Coefficient of Variation: 10% (for 0.1 to 0.5 ppm), 5% (for 0.5 to 2 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 | 1 minute per pump stroke | ||
| Detecting Limit | 0.01 ppm (n=10) | ||
| Colour Change | Pink → Yellow | ||
| Reaction Principle | N2H4 + H2SO4 → (NH3)2SO4 | ||
| Coefficient of Variation | 10% (for 0.1 to 0.5 ppm), 5% (for 0.5 to 2 ppm) | ||
| Shelf Life | 3 Years | ||
| Corrections for temperature & humidity | 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 & Ammonia | + | Yellow |
Other substance measurable with this detector tube
| Substance | Correction Factor | No. of pump strokes | Measuring Range |
| Dimethyl hydrazine | Factor:1 | 5 | 0.1 to 2 ppm |
| Methyl hydrazine | Factor: 6 | 5 | 0.6 to 12 ppm |
| Calibration gas generation | Permeation tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 0.01 ppm | - | 2.9 to 98% |
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