Canadian based international group of companies based in Toronto; a developer and manufacturer ofand breath testing instruments. ACS is presenting the Alcolock WR3 . Also known as an ignition interlock, this in-car breath alcohol screening instrument prevents a vehicle from starting if it detects a driver’s blood alcohol concentration (BAC) over a pre-set limit. ACS has developed the ‘Alcohol Interlock’ for transportation safety. The product uses the same technology used by police in roadside screening.