Wouldn’t it be nice to have something in your pocket to tell you you’ve had too much to drink?
Many people think so, which is why small, hand-held breathalyzers have become so popular. But can you fully depend on these gadgets to prevent you from getting a DUI?
How do hand-held breathalyzers work?
Hand-held breathalyzers require you to exhale into the device where sensors pick up ethanol molecules, aka alcohol, from your breath. The measurement then uses a predetermined ratio to calculate blood alcohol content (BAC).
While there are professional-grade breathalyzers used by law enforcement, there are many portable ones being marketed to people who enjoy going out with friends but don’t want to risk getting a DUI. However, there are several factors that influence the accuracy of a portable breathalyzer.
The two common sensors used in breathalyzers are semiconductor and fuel cell sensors. Semiconductor sensors are less expensive and are typically used in portable, store-bought breathalyzers. But they are less precise than what law enforcement uses.
There are other issues that impact the accuracy of hand-held breathalyzers, such as:
- Calibration: Accurate readings depend upon a breathalyzer’s proper calibration. Over time, the sensors drift and become less reliable. Many portable breathalyzers purchased in a store or online can’t be calibrated by the user.
- User error: Manufacturers include precise instructions regarding the use of their breathalyzers. Most recommend waiting 15 to 20 minutes after your last drink or food intake before using it. Some users may fail to wait the full amount of time or use improper blowing techniques.
- Environment: Extreme temperatures or high humidity can interfere with a breathalyzer’s performance. If exposed to chemicals, such as clearing products, they may also give off false readings.
- Device quality: Not all breathalyzers are the same and can vary widely in quality and price. To keep the costs low, some manufacturers sacrifice the device’s precision, making it less dependable.
If you do use a hand-held breathalyzer, which informs you that your BAC is way below the legal limit, and you still get a DUI, it’s crucial that you work with someone who can help you build a strong defense.