Product Description
Details
GAS174D Butadiene-1,3 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.
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Performance |
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Measuring Range |
1.3 to 200 ppm |
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Sampling Hours |
1 to 8 hours |
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Detecting Limit |
1.3 ppm (8 hours) |
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Colour Change |
Reddish purple Pale brown |
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Reaction Principle |
Butadiene reacts with Permanganate to produce light brown reaction product. CH2:CHCH:CH2 + MnO4 (Reddish purple) Pale brown product |
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Coefficient of Variation |
10% (for 10 to 200 ppm∙hr) |
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Shelf Life |
Up to 2 years from point of manufacture |
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Corrections for |
Temperature correction is necessary |
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Store the tubes at cool and dark place. |
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Possible coexisting substances and their interferences |
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Substance |
Concentration |
Interference |
Change colour by itself |
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Unsaturated hydrocarbons |
- |
Plus error |
Produce pale brown discoloration |
Other substances measurable with this detector tube
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Substance |
Correction |
Measuring range |
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Ethylene |
Factor: 1.2 |
1.56 to 240 ppm |
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Vinyl Chloride |
Factor: 1.2 |
1.56 to 240 ppm |
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Isoprene |
Factor: 2.0 |
2.6 to 400 ppm |
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Trans-1,2-Dichloroethylene |
Factor: 3.0 |
3.9 to 600 ppm |
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