▎ 摘　　要

NOVELTY - Device includes a tubular casing (2), a mouth piece (3), a valve (4), a graphene employed gas sensor (5) having an end face, a back side and controller terminal. The sensor comprises a heating system, and further comprising an aluminum oxide microtubules and a coil. The heating system is covered by a layer of tin oxide and graphene. The aluminum oxide microtubules is covered by a layer of aluminum oxide and graphene, a sensor (9), microcontroller, multiple of pins and a battery. The alcohol present in the breath is oxidized into acetic acid when passed through heating system. The acetic acid cascades on tin oxide-graphene layer to decrease the resistance by using the external load resistance and the resistance variation is converted into a suitable voltage resistance. USE - Device for detecting alcohol concentration in blood through breath analysis. ADVANTAGE - The device provides higher sensitivity and accurate results for detection of alcohol to prevent accidents due to drink and drive accidents. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of operation of device, which involves: (A) providing a sample of exhaled breath for heating required by semiconductor sensor; (B) adjusting the date and time in real time clock to display the time on which alcohol test is taken; (C) detecting the concentration of alcohol in breath using semiconductor sensor; (D) converting the analog output data of semiconductor sensor into digital data within the microcontroller which is further processed by an algorithm to produce the actual value of blood alcohol concentration; (E) selecting a individual profile in which the value is indicating the blood alcohol concentration is to be stored; and (F) analyzing the displayed result of blood alcohol concentration of an individual to decide if person is within permissible limit to drive a vehicle safely. DESCRIPTION OF DRAWING(S) - The drawing shows the block diagram showing the device for the determination of blood alcohol concentration. Tubular casing (2) Mouth piece (3) Valve (4) Graphene employed gas sensor (5) Sensor (9)