SKU: GAS81D Categories: ,

GAS81D Acetic Acid Passive Dosi-Tubes 0.5ppm – 100ppm

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SKU: GAS81D Categories: ,


GAS81D Acetic Acid Gastec Passive Sampling Dosi Tubes (Time Weighted Average Detector Tubes)

The Dosi-Tube System allows an operator to evaluate the level of gas a worker is exposed to over a time period such as a working shift.

The Dosi-Tube is easily clipped into the Dosi-tube holder (GAS710) which is worn on a garment of clothing.

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 Acetic acid neutralizes alkali to discolour the indicator to yellow.
Coefficient of Variation 5% (for 5 to 20 ppm∙hr), 10% (for 20 to 100 ppm∙hr)
Shelf Life Up to 3 years from point of manufacture
Corrections for
temperature & humidity
Temperature correction is necessary
Store the tubes at cool and dark place.
Possible coexisting substances and their interferences
Substance Interference Change colour by itself
Hydrogen Chloride, Nitric Acid Plus error Produce yellow stain
Chlorine, Nitrogen Dioxide Plus error Produce yellow stain
Hydrogen Cyanide, Sulphur Dioxide Plus error Produce yellow stain
Other substance measurable with this detector tube
Substance Correction Sampling Hours 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

Additional Information

Weight 0.1 kg
Multi Gas Tags

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Gas Range



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