Drager Alcotest 3820/4000 Mouthpieces

Breatho Personal Breathalysers use a high‑quality fuel cell sensor that provides stable, reliable measurements and is unaffected by common mouth contaminants.

Calibrating a breathalyser is essential to ensure accurate and reliable measurements of blood alcohol concentration (BAC). Calibration is the process of adjusting the device to a standard reference point to maintain its accuracy.

The Alcotest® 4000 Personal Breathalyser from Dräger delivers police‑grade accuracy in a compact, easy‑to‑use device. With a single button press, simply take a breath and blow — within seconds, the Alcotest® 4000 provides your breath alcohol concentration. Dräger’s trusted sensor technology has been used by law enforcement worldwide for more than six decades.