Patent ID: 9562889
Date: 2017-02-07
CPC Classifications: G01N

Claim:
1. A breathalyzer, comprising: an alcohol sensor to receive a breath air sample and measuring percent blood alcohol concentration (BAC%) based on the breath sample; a non-volatile memory to store calibration data of the alcohol sensor comprising one or more reference points; a processing unit to determine an accuracy of the alcohol sensor using a user's body as a simulator in a monitoring mode by receiving a BAC% measurement from the alcohol sensor based on the breath sample provided by the user at a sample time, the sample time determined based on a time to a predetermined calibration point from a drink start time; to determine a reference point from the BAC% measurement; and to store the reference point in the non-volatile memory; and to determine a BAC% reading based on the BAC% measurement by the alcohol sensor and the calibration data stored in the non-volatile memory in an operation mode; and a screen to display the BAC% reading and other information to the user.