$BICB The CannaSens THC Breathalyzer is a drug impairment recognition system based on a "breath testing technology" to be utilized by public safety officials in the field. As a result of a number of states legalizing the use of marijuana, law enforcement has been looking for methods or systems to use in the field to detect marijuana impaired driving offenses. The CannaSens THC Breathalyzer is compact and easy to use to enhance roadside field sobriety tests where recent marijuana use is suspected.