Dräger-Tube Hydrogen Sulfide Sulfur Dioxide 0.2%/A (10)PN: CH28201 Dräger-Tubes™ are used together with a Dräger tube pump for measurements of gases, vapors and aerosols, usually in air, and are one of the classic methods of gas analysis. This Dräger-Tube is used for the detection of sulfur dioxide hydrogen sulfide and has the following standard measuring range: 0.02-7 Vol% Measurements: 10 Application Range Standard Measuring Range 0.2 to 7 vol. % Number of Strokes n 1 2 desorption strokes in clean air Time for Measurement approx. 2 min Standard Deviation ± 5 to 10% Color Change brown to bright yellow Ambient Operating Conditions Temperature 0 to 40 °C Absolute Humidity max. 40 mg H2O/L Cross Sensitivity All substances oxidized by iodine are indicated, but with different sensitivities. It is impossible to measure hydrogen sulfide and sulfur dioxide in the presence of such substances. Extension of the Measuring Range Using n=10, divide the reading by 10; the measuring range will be 0.02 to 0.7 vol.%