Gastec 61 Quick-measuring Detector tubes Cresol C6H4(CH3)OH (0.4~ 62.5 ppm)
ManufacturerGastec(View more products from this manufacturer)
Model61
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Indicator: 1 to 25 ppm
Measuring Range:
+ 0.4 to 1 ppm, Number of Pump Strokes 4
+ 1 to 25 ppm, Number of Pump Strokes 2
+ 25 to 62.5 ppm, Number of Pump Strokes 1
Sampling Time: 1.5 minute per pump stroke
Colour Change: Pale yellow → Gray
Reaction Principle: C6H5(CH3)OH + Ce(NO3)6^2- → C6H5O(CH3)Ce(NO3)5^2-
Coefficient of Variation: 15% (for 1 to 5 ppm), 10% (for 5 to 25 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 | 1.5 minutes per pump stroke | |||
| Detecting Limit | 0.1 ppm (n = 4) | |||
| Colour Change | Pale yellow → Gray | |||
| Reaction Principle | C6H5(CH3)OH + Ce(NO3)62- → C6H5O(CH3)Ce(NO3)52- | |||
| Coefficient of Variation | 15% (for 1 to 5 ppm), 10% (for 5 to 25 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 |
| Ammonia | 2000 ppm | + | White |
| Amines | 2000 ppm | + | White |
| Phenol | + | Gray |
Other substance measurable with this detector tube
| Substance | Correction Factor | No. of pump strokes | Measuring Range |
| m-Cresol | 1.0 | 2 | 1 to 25 ppm |
| p-Cresol | 1.0 | 2 | 1 to 25 ppm |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 20mg/m3(IFV) | - | - |
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