Description
Dräger Tubes For Short Term Measurements: Sulfuryl Fluoride 1/a
Dräger Safety offer a massive range of short-term gas detection tubes for the measurement of various gases. This particular set of tubes is for (Sulfuryl Fluoride 1/a).
The tubes come in a pack of 10 tubes and have a shelf life of 2 years.
Application Range:
| Standard Measuring Range: | 1 to 5 ppm |
| Number of Strokes n: | 6 |
| Time for Measurement: | approx. 3 min |
| Standard Deviation: | ± 30 % |
| Colour Change: | light blue to light pink |
Ambient Operating Conditions:
| Temperature: | 0 to 40 °C |
| Absolute Humidity | 15 to 90 % r.h. At 0 to 10 °C, concentrations of sulfuryl fluoride are displayed with approximately half sensitivity. At 30 to 40 °C and air humidity < 30 % r.h. the displays can only be recognised as of > 2 ppm. At 30 to 40 °C and air humidity > 75 % r. h., concentrations of sulfuryl fluoride are displayed with approximately half sensitivity |
Reaction Principle:
a) pyrolysis sulfuryl fluoride ~> HF b) HF + zircon / quinalizarin ~> pink reaction product (HF destroys the quinalizarin/zircon complex by complexation of the zircon)
Cross Sensitivity:
Fluorinated hydrocarbons are also displayed with different sensitivities. Ammonia and other basic gases could, depending on the concentrations, either shorten or prevent the color change. The following chemicals have no influence on the display of 3 ppm sulfuryl fluoride: 2 ppm formaldehyde, 5 ppm methyl bromide and 1 ppm phosphine. When the oxygen concentration decreases, the sensitivity decreases. For example, the 3 ppm display at 18 % oxygen is very weak..
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