Patent ID: 7841224

Claim:
A pre-calibrated replaceable alcohol sensor module, comprising: a printed circuit board (PCB); a breath alcohol sensor configured to removably attach to a breath sampling tube of a breathalyzer to receive a breath air sample and to measure blood alcohol concentration (BAC) based on analysis of the breath air sample; a non-volatile memory unit for storing pre-calibrated data of said breath alcohol sensor module; and an electronic circuitry mounted on said PCB and operable to transmit measured BAC from said breath alcohol sensor to a primary signal processing unit of said breathalyzer and operable to transmit said pre-calibrated data of said breath alcohol sensor module from said non-volatile memory unit to said primary signal processing unit of said breathalyzer to provide accurate measurement of said breath air sample; wherein said pre-calibrated replaceable alcohol sensor module is installable in said breathalyzer to replace existing pre-calibrated replaceable alcohol sensor module in said breathalyzer after being used for a predetermined number of times; and wherein said pre-calibrated replaceable alcohol sensor module is configured to operate upon installation in said breathalyzer without requiring calibration of said breathalyzer.