Here's a general overview of how an in-car breathalyzer works:
1. Installation: The in-car breathalyzer is typically installed in a vehicle's dashboard or center console by a qualified technician. It may be connected to the vehicle's ignition system, preventing the vehicle from starting unless a valid breath sample is provided.
2. Breath Sampling: When the driver wants to start the vehicle, they must provide a breath sample into the breathalyzer's mouthpiece. The device typically uses an electrochemical sensor or semiconductor sensor to analyze the breath sample and determine the BAC.
3. BAC Analysis: The breathalyzer measures the alcohol content in the driver's breath and compares it to the pre-set BAC limit. If the BAC is below the limit, the vehicle will start as usual.
4. Interlock Mechanism: If the BAC exceeds the limit, the breathalyzer will sound an alarm and prevent the vehicle from starting. The driver will need to wait until their BAC drops below the limit before they can attempt to start the vehicle again.
5. Calibration: In-car breathalyzers require periodic calibration to ensure accuracy. This involves calibrating the device using a known alcohol standard to verify that it is measuring BAC levels correctly.
6. Legal Requirements: In many jurisdictions, individuals convicted of drunk driving may be required to install and use an in-car breathalyzer as part of their probation or license reinstatement requirements.
In-car breathalyzers play a crucial role in preventing drunk driving by ensuring that individuals with elevated BAC levels are not able to operate a vehicle. They serve as a deterrent and help promote road safety by reducing the risk of alcohol-related accidents and injuries.
