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2. Ignition interlock device - Wikipedia

   en.wikipedia.org/wiki/Ignition_interlock_device

   If the resultant breath-alcohol concentration analyzed result is greater than the programmed blood alcohol concentration (which varies between countries), the device prevents the engine from being started. The interlock device is located inside the vehicle, near the driver’s seat, and is directly connected to the engine’s ignition system. [1]

3. Breathalyzer - Wikipedia

   en.wikipedia.org/wiki/Breathalyzer

   Higher-end personal breath analyzers and professional-use breath alcohol testers use platinum fuel cell sensors. These too require recalibration but at less frequent intervals than semiconductor devices, usually once a year. [citation needed] There are two ways of calibrating a precision fuel cell breath analyzer, the wet-bath and the dry-gas ...

4. BACtrack - Wikipedia

   en.wikipedia.org/wiki/BACtrack

   BACtrack was founded by Keith Nothacker in 2001, during his senior year at the University of Pennsylvania, when he began selling consumer products online. [3]In 2004, BACtrack received the U.S. Food and Drug Administration (FDA) marketing clearance to sell the AlcoMate CA2000 breathalyzer. [4]

5. Intoxalock - Wikipedia

   en.wikipedia.org/wiki/Intoxalock

   The hand-held Intoxalock device requires the driver of the vehicle to submit an "inhale, blow" breath sample into the device. After the device calculates the driver's blood alcohol content, the device displays a message telling the driver to start the vehicle. A series of "rolling retests" occur periodically as the vehicle is being driven, and ...

6. Scientists say a marijuana breathalyzer is in the works - AOL

   www.aol.com/news/scientists-marijuana...

   A device that can detect THC, the chemical in cannabis responsible for its psychoactive effects could work as a Breathalyzer-type tool to test for marijuana.

7. Breath gas analysis - Wikipedia

   en.wikipedia.org/wiki/Breath_gas_analysis

   Breath gas analysis is a method for gaining information on the clinical state of an individual by monitoring volatile organic compounds (VOCs) present in the exhaled breath. Exhaled breath is naturally produced by the human body through expiration and therefore can be collected in non-invasively and in an unlimited way. [ 1 ]