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Interlock Device Overview

The interlock device is a breath-alcohol measuring instrument with a automobile immobilizer. After submitting a breath alcohol measurement, it forbids a driver who has drank alcohol from starting the automobile. It can quickly be installed into the vehicle. By installing an interlock device, you can possibly prevent accidents brought on by alcohol consumption. In addition, long-term variations in the drinking attitude may be an added benefit.

Properties of an Ignition Interlock Device

- Logs all events in data storage for review later.
- Leads to instant separation of alcohol intake and getting behind the wheel.
- Supports long-term attitude changes overcoming alcohol troubles.
- Prohibits the starting of the car or truck when alcohol is picked up in the driver's breath.
- Is resistant to tampering.
- Offers the possibility for recurring retests.
- raises safety for drivers and passengers.
- Can improve the image of transport companies.
- Prevents accidents while under the influence of alcohol.

Interlock Device Measurement Process

1. Turn vehicle's ignition on
2. Vehicle operator receives request to blow into the interlock device
3. Measurement of breath alcohol concentration takes place
4. Accepted breath sample: motor starter is enabled > start motor
4. Rejected breath sample: motor starter is disabled

Basic Components and Application of an Ignition Interlock Device

Interlock devices include two main components: the breath-alcohol measuring instrument with the measuring system, which is situated inside the automobile, and a control unit which is typically installed below the dashboard and allows or prevents electrical current being provided to the vehicle's starter system. When the ignition is switched on, the device requests a breath sample from the driver. The result of the breath-alcohol concentration measurement determines whether the vehicle's starter is launched and the motor can be started. Automobile drivers come across long long delays after switching on the ignition particularly annoying. Therefore, during development of various interlock devices, attention was paid to making certain that the instrument would be ready for use quickly.

Device Measuring Technique & Data Storage

The interlock device ascertains the B.A.C by means of an electrochemical sensor system, frequently breath-alcohol measuring instruments of police authorities. It reacts with high specificity to alcohol. As a result, other exhaled substances or cigarette smoke do not disturb the measurement result. While the vehicle is in use, relevant events are registered in the interlock device's data lognot limited to: time, date, submission of or refusal to submit a breath sample, measured alcohol concentration, engine starts and stops, electrical bypassing of the interlock and any other attempts to tamper with the device. The data can be delivered electronically and compiled in a data record.

Manipulating an Interlock Device
The utilization of auxiliary means to outsmart an interlock device, as for example an air pump, balloon, or the use of air filters, is reliably detected and starting the motor is disallowed. A vehicle start-up as by push-start or jump-start without previous submission of an accepted breath sample is recorded in the data log.
Source: www.interlock-devices.com - "interlock device">Interlock Device
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