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Alcohol Sensing

Discover the next generation of alcohol sensors: A touch-free sensor integrated into the dashboard of the car (with no calibration required) for the automotive market, or a connected system for public transportation. 

Our current projects include the development of a new technology to allow for contact-free, unobtrusive measurement of the driver’s breath alcohol. In Virginia, US, the Driver Alcohol Detection for cars is already being tested on the roads, and our solutions for public transport is available on the market.

The solution we offer for public transport is called Sesame. It is the next generation of alcolocks - for safe and secure starts to each transport, with little inconvenience to the business. Sesame can be used in vehicles or as a stationary check-in system. Using the system, you ensure that you have the right driver with the right competence, in the right condition. It only takes 9 seconds.


Raimo Gester

Raimo Gester

Strategic Business Development

+46 73 384 4472



Learn More About Alcohol Sensing

Alcohol sensors in cars

In the field of automotive alcohol safety systems, we enjoy close cooperation with Autoliv, a leading global supplier of those kinds of systems. Our current projects include the development of a new technology to allow for contact-free, unobtrusive measurement of the driver’s breath alcohol. When measuring blood alcohol concentration, most people are familiar with breathalysers (which require drivers to provide a deep lung sample by blowing into a tube or other sensor). In contrast, the breath-based system being developed by Senseair and Autoliv Development is designed to unobtrusively analyse alcohol on the driver’s breath. Drivers will simply be able to enter the vehicle and breathe as they normally would.

Key benefits:

  • Contact-free
  • Unobtrusive
  • No calibration required
  • Measures alcohol as the driver breathes normally while seated in the driver's seat

How does it work?

The system draws the driver’s exhaled breath into a sensor that 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 the exhaled air.

Molecules of alcohol and tracers like carbon dioxide absorb infrared light at specific wavelengths. The Senseair device directs infrared light beams on the breath sample and analyses the wavelengths returned in order to quickly and accurately calculate the alcohol concentration.

We have already implemented one touch-free unit, but we continue to move towards a prototype that can be integrated into a vehicle's dashboard by utilising mirrors to reduce the required optical length of the device. The device is highly sensitive and able to analyse diluted breath samples at dilutions expected from a driver’s natural breath plume.

Testing the prototype

To test the prototype under development, the Driver Alcohol Detection System for Safety (DADSS) Research Program has developed a wet gas breath simulator. The simulator blends gases like carbon dioxide, nitrogen, and oxygen with moisture to create an “exhaled breath” that matches the composition, temperature, and pressure of natural human breath. Ethanol can then be added to the breath at various concentrations. In addition, the Senseair prototype will continue to run through a series of tests with human subjects, as well as durability tests in different environmental situations, from temperature shifts to sudden changes in motion, and interferences (e.g. dust or mechanical shock).

Read more about the project at https://www.dadss.org/breath-based-technology/

Alcohol sensors in public transportation

The solution we offer players in public transportation is called Senseair Safe Start (please check the website aimed at that solution). It is the next generation of alcolocks - for safe and secure starts to each transport, with little inconvenience to the business.

Safe Start can be used in vehicles or as a stationary check-in system. By checking in at one of these units, you ensure that the right driver, in the right condition, and with the right skills is behind the wheel. It only takes 9 seconds. 

Key benefits:

  • Contact-free
  • Connected 
  • Works as a roadblock against driving under the influence 

Our sensors are always connected, and the driver identifies with his or her ID card/driver's license. A single exhalation on one of the sensors opens the entire fleet for the period of time that you decide a test is valid (4-8 hours). 

Sober at work

With Safe Start, a team can check in based on function instead of person. The station is only used to ensure that the entire team is tagged. It is suitable for e.g. rescue stations, air traffic controls, ferries, trains, paper mills, nuclear power plants, lift systems, amusement park staff 

If there is an alarm when checking in, it will not flash visibly to anybody. There is an option to send a text message to the person who just "got flagged" and a message to the responsible leader, for example 

Key Benefits:

  • Safer working environment
  • Sober colleagues
  • Unobtrusive
  • Fast
  • Hygienic

Wall is a stationary unit adapted for large staff flow and can be used independently for random control (without creating queues) for "sober entry". Each test is preceded by identification with a personal ID card. When drivers have checked in through Sesame at the beginning of their shift, they can simply get into the vehicle, scan their card, and go.  

Our most important arguments for Sesame: 

  • Plug & Play  
  • Always connected  
  • Integrated with existing administrative systems  
  • Ensures sober entry 

Sober Driver - Sensor inVehicles

At Senseair, we have a group entirely dedicated to the development of alcohol sensing technology and applications. Our core competency lies in the areas of sensor technology, measurement systems, microsystems, physiological interactions, mechatronic design, and man-machine interfacing.

We have a well-equipped laboratory for prototyping, small-scale production, and testing. Together with a network of partners, we are capable of managing projects from idea to production. 

If you wish to read more about the Senseair R&D department, please visit Research & Development. 


In today's state-of-the-art breath analysers, the subject has to deliver a forced and prolonged expiration into a mouthpiece. This procedure is time-consuming and requires significant effort for people with reduced lung capacity. For hygienic reasons, mouthpieces have to be exchangeable, disposable and taken care of.

With our technology, the subject can deliver a short puff of air at 5-10 cm distance from the sensor. By correlation to simultaneous measurement of CO, the true breath alcohol concentration can be determined using the equation:

Due to the relatively small variability of the undiluted CO₂-concentration between individuals, the measured diluted breath alcohol (BrAC) concentration can be normalized using the dilution factor (COundiluted/COdiluted), thus representing the undiluted value.

Both alcohol and CO are measured using non-dispersive infrared spectroscopy (NDIR). We have built a powerful technology platform for NDIR analyzers. On top of that, a flexible user interface enabling a multitude of breath analyser configurations to be generated.

Configure your own solution

There are three simple steps from Sensor Core to a finished inCase solution. Choose your adaptable platforms and add all the features you need.


Choose your Sensor Core platform


Add features to your Sensor onBoard


Design your Sensor inCase

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