for blood alcohol
The AlcoBlow is a portable, handheld, fast-acting breath-testing instrument that will indicate if a person has alcohol in their system. It uses the Lion fuel cell sensor, so the reading is very unlikely to be affected by anything but alcohol in the subject's breath.
Originally designed for use by police at road blocks for rapid pre-screening, there is no physical contact between the subject and instrument, so there is no mouthpiece to replace for each test. Its speed and ease of use have made it popular in safety critical industries and in alcohol control programmes with prisons and education establishments.