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


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Shelf Life - a1-cbiss will never dispatch detector tubes with less than 3 months remaining before expiry. a1-cbiss employ a stock rotation policy of first in, first out. Specific shelf life requirements must be identified at the point of order placement (use the comment box in the checkout process). The expiry date is printed clearly on the front of the detector tube packet.

Excl. VAT: £36.75 Incl. VAT: £44.10
Excl. VAT: £36.75 Incl. VAT: £44.10

Product Description


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




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



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


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Product Downloads

View FileGAS81D Acetic Acid Datasheet
View FileGastec Detector Tube List 25th Edition & Manual
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