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SKU: GAS151D Categories: ,

GAS151D Acetone Passive Dosi-Tube 5 – 1500ppm

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SKU: GAS151D Categories: ,


GAS151D Acetone 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 5 to 1500 ppm
Sampling Hours 1 to 10 hours
Detecting Limit 5ppm (10 hours)
Colour Change Yellow          Reddish Brown
Reaction Principle Acetone reacts with Hydroxylamine Phosphate to liberate Phosphorus Acid, which discolours pH indicator to reddish brown.

3CH3COCH3 + (NH2OH)3H3PO4         H3PO4
H3PO4 + Base         Phosphate

Coefficient of Variation 10% (for 50 to 1500 ppm∙hr)
Shelf Life Up to 2 years from point of manufacture
Corrections for
temperature & humidity
Temperature correction is necessary
Store the tubes in the refrigerator to keep at 10oC (50oF) or below.
Possible coexisting substances and their interferences
Substance Concentration Interference Change colour by itself
Aldehydes, Ketones Plus error Discolours reddish brown
Acid gases Plus error Discolours reddish brown
(Unclear demarcation)
Other substance measurable with this detector tube
Name of Substance Correction Factor Measuring Range
Methyl Ethyl Ketone 1.3 6.5 to 1950 ppm
Methyl Isobutyl Ketone 2.3 11.5 to 3450 ppm
Acetaldehyde 0.8 4 to 1200 ppm

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