Personal breathalyzers can be a valuable tool for making responsible decisions about when it's safe to drive after drinking. While online BAC calculators like BACDrunk.com provide helpful estimates, a quality breathalyzer offers more precise measurements of your actual blood alcohol concentration (BAC).
If you're new to understanding BAC and how it affects your body, we recommend reading our comprehensive guide on what BAC calculators are and how they work to get familiar with the basics before investing in a personal device.
BACtrack S80 Pro
DOT/NHTSA approved, police-grade fuel cell sensor. Quick results in 10 seconds.
$130
BACtrack Go
Compact, portable breathalyzer with one-button operation. Perfect for on-the-go BAC testing.
$40
BACtrack C8
Professional accuracy in a compact size with fuel cell technology. Features rechargeable battery and easy operation.
$90
BACtrack C6
Compact, smartphone-connected breathalyzer with keychain design
$70
Features to Consider
When shopping for a personal breathalyzer, consider these important features:
- Sensor type: Fuel cell sensors offer superior accuracy but at a higher price
- Recalibration requirements: All breathalyzers need periodic recalibration (typically every 6-12 months or 200-300 tests)
- Display: Digital displays with backlight features are easier to read in low-light environments
- Memory function: Some devices store previous test results, which can be useful for tracking
- Size/portability: Consider where and how you'll be using the device
- Battery life: Rechargeable units save money over time compared to disposable batteries
- Warm-up time: Some units require a warm-up period before use
- Mouthpieces: Replaceable or washable mouthpieces are more hygienic for multiple users
How to Use a Breathalyzer Correctly
To get the most accurate readings from your personal breathalyzer:
- Wait after drinking: Test at least 15-20 minutes after your last drink to avoid residual mouth alcohol skewing results
- Avoid eating/smoking: Don't eat, drink, or smoke for at least 15-20 minutes before testing
- Take multiple readings: For greater confidence, take 2-3 readings a few minutes apart
- Clean the device: Keep the sensor and mouthpiece clean according to manufacturer instructions
- Recalibrate regularly: Follow the recommended recalibration schedule
- Check batteries: Ensure batteries are fully charged or fresh
- Blow correctly: Follow instructions for how long and how forcefully to blow
Remember that alcohol effects can last much longer than you might expect, so even if your BAC is declining, you may still be impaired for several hours after your last drink.
Limitations of Personal Breathalyzers
Understanding the limitations of personal breathalyzers is crucial:
- Not legally defensible: Results from personal devices can't be used in court or to contest a DUI charge
- Environmental sensitivity: Temperature, altitude, and humidity can affect readings
- Calibration drift: Accuracy decreases over time without proper recalibration
- False positives: Some substances can trigger false readings (mouthwash, certain foods, medications)
- User error: Improper use can significantly impact accuracy
A quality personal breathalyzer can be a valuable tool for promoting responsible alcohol consumption and decision-making. However, it should always be used as one part of a broader plan for safe drinking practices.
The sobering reality is that drunk driving continues to claim thousands of lives each year. Remember that the safest option after drinking is to use alternative transportation methods like designated drivers, taxis, rideshares, or public transport. No matter what your breathalyzer reads, if you feel impaired in any way, don't drive.