This European Standard specifies test methods and performance requirements for breath alcohol controlled alcohol interlocks having a mouthpiece. It covers alcohol interlocks intended for general preventive use.

This European Standard is mainly directed to test laboratories and manufacturers for alcohol interlocks. It defines requirements and test procedures for type approval.

Several parameters (as for example alcohol concentration or breath volume) are specified in this European Standard for the purpose of type testing according to this standard only. However, it may be necessary according to national regulations or depending on user requests to set the values of the prescribed parameters differently for use of the alcohol interlocks.

This European Standard also applies to alcohol interlocks integrated into other systems of the vehicle.

This European Standard does not apply to

• alcohol interlocks intended to be used mainly in traffic safety programs for drink driving offenders (see EN 50436-1),

• instruments measuring the alcohol concentration in the ambient air in the vehicle,

• alcohol interlocks not having a mouthpiece.