BrAC/TAC measurements revealed an R-squared of 0.65. A comparison of BrAC/TAC in the post-45-min after drinking revealed an R-squared of 0.90.  
Figure 1 shows concomitant measurements of BrAC/TAC taken over an 8 hour period.

Discussion

The ability to easily and continuously monitor alcohol intake has many uses.
Currently, two transdermal devices exist to monitor alcohol in criminals of alcohol related offenses: the Secure Continuous Remote Alcohol Monitoring (SCRAM) device produced by Alcohol Monitoring Systems (AMS) and the Transdermal Alcohol Detection (TAD) system developed by BI Incorporated (BI) [1]. Both SCAM and TAD are ankle bracelets used to monitor alcohol-related offenders, and not marketed as consumer devices to the public.