Dräger-Tubesâ„¢ 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 phosgene and has the following standard measuring ranges: 0.25-5 ppm 0.01-0.3 ppm Measurements: 10