Drager Sulphur Dioxide 2/a-D (0.5-20 ppm) Diffusion Tube
Please note: this product has been discontinued with no replacement.
Drager Sulphur Dioxide 2/a-D (Measuring: 0.5 to 20 ppm) Diffusion Tube - Max. Oper. Time: 4 hrs.
Note: This product has a shelf life of 2 years.
Application Range | |
Standard Range | Measurement Time |
5 to 150 ppm | 1 h |
2.5 to 75 ppm | 2 h |
1.3 to 38 ppm |
4 h |
0.7 to 19 ppm | 8 h |
Standard Deviation | ± 20 to 25 % |
Color Change | blue violet - light yellow |
Ambient Operating Conditions
Temperature | 10 to 30 °C |
Absolute Humidity | 1 to 15 mg H2O / L |
Reaction Principle
SO2 + pH Indicator light yellow reaction product
Cross Sensitivity
It is impossible to measure sulfur dioxide in the presence of other acidic substances.
During a 6-hour measurement, 10 ppm hydrochloric acid produces a pink color up to 25 ppm x h. During a 4-hour measurement, 20 ppm acetic acid produces a yellow color up to 60 ppm x h. Nitrogen dioxide and chlorine also have an influence on the indication.
Application Range | |
Standard Range | Measurement Time |
5 to 150 ppm | 1 h |
2.5 to 75 ppm | 2 h |
1.3 to 38 ppm |
4 h |
0.7 to 19 ppm | 8 h |
Standard Deviation | ± 20 to 25 % |
Color Change | blue violet --> light yellow |
Ambient Operating Conditions | |
Temperature | 10 to 30 °C |
Absolute Humidity | 1 to 15 mg H2O / L |
Reaction Principle | |
SO2 + pH Indicator light yellow reaction product | |
Cross Sensitivity | |
It is impossible to measure sulfur dioxide in the presence of other acidic substances. During a 6-hour measurement, 10 ppm hydrochloric acid produces a pink color up to 25 ppm x h. During a 4-hour measurement, 20 ppm acetic acid produces a yellow color up to 60 ppm x h. Nitrogen dioxide and chlorine also have an influence on the indication. |