Gastec 乙酸被动发现管 CH3CO2H 81D(0.5~100 ppm)

Indicator: 5 ~ 100 ppm
Measuring Range: 0.5 ~ 100 ppm
Sampling Hours: 1 to 10 hours
Colour Change: Purple → Yellow
Reaction Principle: CH3CO2H + NaOH → CH3CO2Na 
Coefficient of Variation: 5% (for 5 to 20 ppm-hr), 10% (for 20 to 100 ppm-hr)
Nr. of tests: 10

Detail

Catalog

Performance
Measuring Range 0.5 to 100 ppm
Sampling Hours 1 to 10 hours
Detecting Limit 0.2 ppm (10 hours)
Colour Change Purple → Yellow
Reaction Principle CH3CO2H + NaOH → CH3CO2Na
Coefficient of Variation 5% (for 5 to 20 ppm-hr), 10% (for 20 to 100 ppm-hr)
Shelf Life 3 Years
Corrections for temperature & humidity Temperature correction is necessary
Store the tubes at cool and dark place.
Possible coexisting substances and their interferences (NOTE)
Substance Interference Change colour by itself to
Hydrogen chloride, Nitric Acid + Yellow
Chlorine, Nitrogen dioxide + Yellow
Hydrogen cyanide, Sulphur dioxide + Yellow
Other substance measurable with this detector tube
Substance Correction Factor Sampling Time Measuring Range
Formic acid Factor: 1.1 1 to 10 0.55 to 110 ppm
Acetic anhydride Factor: 0.6 1 to 10 0.3 to 60 ppm
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
10 ppm 15 ppm 4 to 19.9%
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