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WR3 User Guide
Getting Started
What is an alcohol interlock?
An alcohol interlock is an in-car breath alcohol
screening instrument. It prevents a vehicle from
starting if it detects that a driver’s breath alcohol
concentration (BrAC) is over a preset limit. It is
designed to fit inside the vehicle, near the driver’s
seat, and connects directly to the vehicle’s ignition
system.
The interlock consists of a handset and relay
module. The relay module enables or disables the
ignition of the motor and stores the handset settings.
To help prevent other people from providing the
required breath samples, the interlock requests
additional breath samples at random intervals
during the trip.
How does it work?
WR3 uses the same alcohol sensing technology used by police in
roadside screening. A special alcohol-sensitive cell detects the amount
of alcohol in the breath. Breath alcohol is directly proportional to the
blood alcohol concentration (BAC).
GETTING STARTED
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