
Gastec 142 醋酸丁酯气体检测管CH3CO2C4H9(0.05~0.8%)
制造商: Gastec Model: 142 - 联系
Indicator: 0.05 to 0.8%
Measuring Range: 0.05 to 0.8%, Number of Pump Strokes 2
Sampling Time: 45 seconds per pump stroke
Colour Change: Orange →Greenish brown
Reaction Principle: CH3CO2(CH2)3CH3 + Cr6+ H2SO4 → Cr3+
Coefficient of Variation: 15% (for 0.01 to 0.2 %), 10% (for 0.2 to 0.8 %)
Nr. of tests: 10
Pump: GV-100S/110S
Measuring Range | 0.05 to 0.8% |
Number of Pump Strokes | 2 |
Correction Factor | 1 |
Sampling Time | 45 seconds per pump stroke |
Detecting Limit | 0.015% (n=2) |
Colour Change | Orange →Greenish brown |
Reaction Principle | CH3CO2(CH2)3CH3 + Cr6+ H2SO4 → Cr3+ |
Coefficient of Variation | 15% (for 0.01 to 0.2 %), 10% (for 0.2 to 0.8 %) |
Shelf Life | 3 Years |
Corrections for temperature & humidity | Temperature correction is necessary |
Store the tubes at cool and dark place. |
Substance | Concentration | Interference | Change colour by itself to |
sulphur dioxide | ![]() |
Two layers (Greenish brown & Pale brown) |
Brown(![]() |
Hydrogen sulphide | ![]() |
Two layers (Greenish brown & Pale brown) |
Greenish brown(![]() |
Alcohols, Esters, Ketones | + | Greenish brown | |
Propane | ![]() |
Cannot use | Pale brown for whole layer ( ![]() |
Toluene | ![]() |
Two layers (Greenish brown & Pale brown) |
Pale brown(![]() |
Calibration gas generation | Static gas dilution method |
TLV-TWA | TLV-STEL | Explosive range |
150 ppm(2015) | 200 ppm(2015) | 1.7 to 7.6% |
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