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 hydrochloric acid/nitric acid bromide and has the following standard measuring ranges: Hydrochloric acid 1-10 ppm Nitric acid 1-5 ppm Measurements: 10