Product Description
Details
GAS152D Methyl Ethyl Ketone 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 holder (GAS710) which is worn on a garment of clothing.
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Performance |
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Measuring Range |
2 to 600 ppm |
|
Sampling Hours |
1 to 10 hours |
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Detecting Limit |
2 ppm (10 hours) |
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Colour Change |
Yellow Reddish Brown |
|
Reaction Principle |
Methyl Ethyl Ketone reacts with Hydroxylamine Phosphate to liberate |
|
Coefficient of Variation |
10% (for 20 to 600 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 in the refrigerator to keep at 10oC (50oF) or below. |
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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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Aldehydes |
- |
Plus error |
Discolours reddish brown |
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Ketones |
- |
Plus error |
Discolours reddish brown |
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Acid gases |
- |
Plus error |
Discolours reddish brown |
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Calibration gas generation |
Diffusion tube method |
