Alcohol Countermeasure Systems (International) Inc. is an international group of companies with one common purpose: to promote road safety through industry-leading breath alcohol testing technology.

ACS began as a research division of Borg-Warner in 1970 with the mandate to develop a technology that would prevent the operation of a vehicle by a drunk driver. The research was successful and in 1976 the group was incorporated as Alcohol Countermeasure Systems in Canada and the USA. This life saving innovation became known as the breath alcohol ignition interlock device (BAIID or IID).

In 1991, Felix J.E. Comeau acquired both companies: Alcohol Countermeasure Systems Corp. in Canada and Alcohol Countermeasure Systems, Inc. in the USA. Under his guidance, ACS developed new alcohol sensing technologies used in a variety of applications spanning a variety of markets including automotive, industrial, law enforcement, as well as public and personal safety.

The corporate family was restructured in 2005 by creating Alcohol Countermeasure Systems (International) Inc. as the holding company and sole shareholder for the international group of companies that emerged with a single coherent vision for quality products and services that includes:

  • Alcohol Countermeasure Systems Corp.
  • Alcohol Countermeasure Systems, Inc.
  • Alcohol Countermeasure Systems (Dongguan) Ltd.
  • ALCOLOCK Sverige AB
  • ALCOLOCK UK Limited

Today, ACS employs over 500 talented individuals to design, manufacture and market the most accurate and reliable alcohol sensing equipment and to deliver the most professional alcohol interlock services through offices in the Americas, Europe and Asia.

For a list of international offices, please click here.


Using trusted electrochemical alcohol sensors, ACS manufactures alcohol interlocks that are utilized through the ALCOLOCK branded service delivery network. ALCOLOCK secure proprietary software applications provides ease of scheduling and management of client data while adhering to government regulations for client personal privacy and security. ALCOLOCK service centres provide quality alcohol interlock installation, monitoring and friendly customer service for legislated ignition interlock compliance programs around the world.

ACS first offered alcohol interlock program services to government jurisdictions in Canada with the Province of Alberta in 1990. Today, Alcohol Countermeasure Systems (International) Inc. operates service delivery companies under the ALCOLOCK brand name in North America and Europe.

In Canada, ALCOLOCK Canada Inc. provides compliance monitoring services through a network of over 100 corporate and contract service centres in ten Provinces and two Territories. Visit for more information about our program services in Canada.

In the United States, ALCOLOCK USA has a network of 100 corporate and contract service centers operating in eleven States. Visit for more information about our program services in the United States.

In Europe, ALCOLOCK Sverige AB established a network of over 30 contract service centres to provide compliance monitoring service throughout Sweden. In France, ALCOLOCK France SAS provided a compliance monitoring diversion program in the Haute-Savoie region and is currently working with the French Administration to develop national regulations for compliance monitoring programs under the new legislation.

In Australia, ACS formed a strategic alliance with Guardian Interlock Systems Australasia Pty Limited to provide alcohol interlock devices and infrastructure services for compliance programs across the country.

With affordable monthly program fees that include the use of an alcohol interlock, ALCOLOCK service delivery companies around the world make it easy for individuals convicted of a drink-driving offense to adhere to their jurisdictional program requirements for reinstatement of their driving license.


The ALCOLOCK™ line of alcohol interlock devices are used in truck, bus and taxi fleets around the world to promote safe driving and to comply with local transport laws. ALCOLOCK personnel and dealers provide fleet owners with innovative fleet management solutions to protect their drivers, cargo and commercial assets. In France and Finland the use of alcohol interlocks is mandatory in vehicles carrying school children. Increasingly, legislators are considering the use of alcohol interlocks for passenger transport and commercial vehicles including heavy vehicles and those that carry dangerous goods.

More information regarding the global offices that offer ALCOLOCK™ alcohol interlock devices can be found at


ACS gained ISO 9001 and ISO 14001 quality certifications to ensure the highest standard for our line of products and associated services while balancing our respect for the environment.

ACS is the only alcohol interlock device manufacturer to achieve TS 16949, asserting our commitment to the automotive OEM market and to overall manufacturing quality. This quality certification accorded ACS Tier-one supplier status to several OEM truck and bus manufacturers including the Volvo Group.

To visit the website of one of our local offices, please visit: