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