In 2019, the researchers in the University of Pittsburgh developed a breath analyzer in order to detect delta-9-tetrahydrocannabinol (THC). THC is the main psychoactive component, which can be detected in breath. The device makes use of carbon nanotubes, (1/100,000) in order to recognize the presence of THC, in the presence of other substances in the breath, for instance alcohol. The THC molecule, from the breath, binds on the surface of the tubes, which then alters the electrical properties, which leads to its detection.
In 2017, Spirosure, Inc., launched Fenom PRO Point-of-Care Breathalyzer which is a portable and the device is battery operated and it comprises of a solid-state sensor. The PoC device works by using an electrochemical reaction in order to produce a millivolt output. This output is then converted into nitric oxide (NO) levels (“parts per billion” (ppb) level) by using an algorithm.