Gastec 155 Quick-measuring Detector tubes Methylcychlohexanone C7H12O (2~100ppm)
ManufacturerGastec(View more products from this manufacturer)
Model155
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Indicator: 2 to 50 ppm
Measuring Range:
+ 2 to 50 ppm, Number of Pump Strokes 3
+ 50 to 100 ppm, Number of Pump Strokes 2
Sampling Time: 3 minutes per pump stroke
Colour Change: Pale Yellow → Yellow
Reaction Principle: C7H12O + C6H3(NO2)2NHNH2 → (CH3)2C:NNHC6H3(NO2)2
Coefficient of Variation: 15% (for 2 to 10 ppm), 10% (for 10 to 50 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 | 3 minutes per pump stroke | ||
| Detecting Limit | 0.2 ppm (n=3) | ||
| Colour Change | Pale Yellow → Yellow | ||
| Reaction Principle | C7H12O + C6H3(NO2)2NHNH2 → (CH3)2C:NNHC6H3(NO2)2 | ||
| Coefficient of Variation | 15% (for 2 to 10 ppm), 10% (for 10 to 50 ppm) | ||
| Shelf Life | 2 Years | ||
| Corrections for temperature & humidity | Temperature correction is necessary | ||
| Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. | |||
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Ketones | + | Yellow |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 50 ppm | 75 ppm | 1.15% or higher |
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