We begin this post with a slight correction. The term “THC breathalyzer” is a bit of a misnomer. There are no devices being used in an official capacity in Canada that measure the amount of THC your body based on a breath sample, so it’s inaccurate to call such a thing a breathalyzer.
Nonetheless, the term has stuck. Perhaps because it’s an easy way to describe the device police will be using to marijuana-impaired by associating it with its alcohol equivalent.