Disposable breathalyzer measuring alcohol level, comprises external tube with mouthpiece and perforated elastic stopper, housing internal tube whose lower end is submerged in indicating liquid

摘要

Disposable breathalyzer measuring alcohol level. The device comprises lowing mouthpiece, with unidirectional valve letting expired air into the apparatus but not out of it, external tube containing indicating liquid and provided with elastic perforated stopper, and internal tube of smaller diameter passing axially through perforated stopper and having its lower end submerged in indicating liquid.