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Gas detection tubes for sulphur dioxide

Supplier: Dräger
To measure the 'spot concentrations' of sulphur dioxide for use with an Accuro® pump.

Uses include determination and measurement of concentration peaks, personal exposure in the inhalation area, detection of leaks in pipelines or gas installations, air analysis in sewers, shafts and confined spaces.

The tube sulphur dioxide1/a has a a prelayer so that H₂S in the TLV range is retained and does not interfere. Hydrogen sulphide and acidic gases may interfere with other tubes.

One stroke is equivalent to a volume of 100 ±5 ml of gas passing through the tube.

The standard measuring range is calibrated at 20 °C and 1013 hPa.

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Description Range Pk VWR Catalog Number Quantity
Sulphur dioxide 1/a 1 - 25 ppm 10 151-0207
Sulphur dioxide 20/a 20 - 2000 ppm 10 151-0194
Sulphur dioxide 50/b 50 - 8000 ppm 10 118-0308
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Model Sulphur dioxide 20/a Sulphur dioxide 50/b Sulphur dioxide 1/a
Colour change Brown yellow to white Blue to yellow Grey blue to white
Humidity Up to 30 mg/l H₂O 1 -15 mg/l H₂O 3 -20 mg/l H₂O
Measurement time 3 minutes 15 seconds/3 minutes 3 minutes
No. of strokes 10 1/10 10
Standard deviation ±10 - 15 %
Standard range 20 - 200 ppm 400 - 8000 / 50 - 500 ppm 1 - 25 ppm
Temperature range 0…40 °C 0…50 °C 15…25 °C
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