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SPONSORS & EXHIBITORS 2022
TAC

Passive Alcohol Sensor Technology

The car that could stop drink driving .

Breath Technology :
The Passive Alcohol Sensor ( PAS ) is novel technology being developed by the DADSS Research Program to unobtrusively analyse alcohol in the driver ’ s breath . Drivers will simply be able to enter the vehicle and breathe as they normally would .
PAS is a more sophisticated technology than anything in use today and differs from existing ignition interlocks and breathalysers in four important ways :
1 There are no large pieces of hardware or equipment in the vehicle cabin , making the system seamless and tamper-proof .
2 Instead of a forced , deep lung sample from the driver , the system is being designed to take accurate , unobtrusive readings in less than a second while the driver breaths normally .
3 The system will meet rigorous performance standards related to speed , accuracy , precision and reliability that are higher than any other alcohol detection technology available today .
4 The technology is contactless . The driver does not need to handle or touch the sensor or breathe into a plastic tube , making it more hygienic and avoiding significant plastic waste .
How it works :
The system draws the driver ’ s exhaled breath into a sensor , which measures the concentrations of alcohol and carbon dioxide present . The known quantity of carbon dioxide in human breath serves as an indicator of the degree of dilution of the alcohol concentration in exhaled air . Molecules of alcohol and those of tracers such as carbon dioxide absorb infrared light at specific wavelengths . Infrared light beams sample the breath and analyse the wavelengths to quickly and accurately calculate the alcohol concentration .
The device is highly sensitive and able to analyse diluted breath samples from the driver ’ s natural breath .
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