Gastec 92M Quick-measuring Detector tubes Acetaldehyde CH3CHO (2.5~100ppm)
Manufacturer: Gastec Model: CH3CHO92M - Request a Quotation
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Indicator: 5~ 100 ppm
Measuring Range:
+ 2.5 ~ 5 ppm, 2 Number of Pump Strokes
+ 5 ~ 100 ppm, 1 Number of Pump Strokes
Sampling Time: 1 minute per pump stroke
Colour Change: Yellow → Red
Reaction Principle: 3CH3CHO + (NH2OH)3H3PO4 → H3PO4, H3PO4 + Base → Phosphate
Coefficient of Variation: 10% (5 ~ 20 ppm), 5% (20 ~ 100 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Store the tubes: 10ºC or below
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 | 0.25 ppm (n=2) | ||
Colour Change | Yellow → Red | ||
Reaction Principle | 3CH3CHO + (NH2OH)3H3PO4 → H3PO4 H3PO4 + Base → Phosphate |
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Coefficient of Variation | 10% (for 5 to 20 ppm), 5% (for 20 to 100 ppm) | ||
Shelf Life | 2 Years | ||
Corrections for temperature & humidity | Unnecessary | ||
Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. |
Substance | Concentration | Interference | Change colour by itself to |
Ammonia | No | ||
Acrolein | 3/5 times | + | Red |
Acetone | 2 times | + | Red |
Methyl ethyl ketone | 6 times | + | Red |
MIBK | 10 times | + | Red |
Calibration gas generation | Diffusion tube method |
TLV-TWA | TLV-STEL | Explosive range |
- | C 25 ppm | 4 to 60% |
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