It’s quite easy to drink more than the legal limit for drivers in your state when you’re having a great time with your friends. There are only two things you can do in such cases. Either call Uber or use a portable breathalyzer to check your blood alcohol content (BAC).
A personal breathalyzer gives you an accurate estimate of your BAC in as little as five seconds and shows you whether or not to get behind the wheel. The best breathalyzers have a compact design and provide fast accurate BAC results, mostly within 0.001 percent.
Read on to learn more about the best personal breathalyzers you can buy today.
Best Breathalyzers of 2025
What is the best personal breathalyzer to buy?
- BACtrack S80 Professional Breathalyzer
- BACtrack C6 Keychain
- BACtrack Trace
- BACtrack C8
- AlcoMate REVO TS200
- Dräger Alcotest 3820
- GDbow Digital Alcohol Tester
- AlcoHAWK Ultra Slim
- Fannel Portable Breath Alcohol Tester
- Professional Digital Breathalyzer
1. BACtrack S80 Professional – Easy to Use
Similar to other highly accurate BACtrack devices, the BACtrack S80 Professional Breathalyzer uses the Xtend Fuel Cell Sensor Technology to give you fast and accurate results with a range of 0.000 to 0.400 percent. It has a 4-digit LCD display screen, easy one-touch operation, and a lightweight portable design. It’s both DOT and NHTSA approved.
Pros
- It’s easy to use
- It’s more accurate than other BACtrack models
- Large LCD display
- One-year warranty
Cons
- Slightly larger than other models
- A more expensive price tag but gives value for your money
- Needs regular calibration
2. BACtrack C6 – Smallest Keychain Breathalyzer
The BACtrack C6 Keychain Breathalyzer gives you police-grade accurate results. It can be used for personal BAC testing or in clinics and hospitals as well as in law enforcement. It comes with two operation modes – a standalone mode and an app mode. When using the app mode, the results are wirelessly delivered to your smartphone or tablet via Bluetooth connectivity. It’s ultra-portable and is in fact the smallest police-grade BAC tester ever built. It weighs 1.5oz and is the size of a 9v battery. You can easily attach it to your keychain or carry it in your pocket when you go for a drink.
Pros
- Smallest and lightest breathalyzer device
- You can even call Lyft or Uber straight from the app if you’ve taken too much alcohol
- It comes with one year warranty
- Gives fast accurate results
Cons
- Its sensors have to be re-calibrated once a year
3. BACtrack Trace Breathalyzer – Best Value for Money
This portable breath alcohol tester is powered by BACtrack’s latest sensor technology to deliver police-grade accuracy in your BAC tests. It’s designed for personal blood alcohol content testing but can also be used to test employees at work, in alcohol treatment centers, or breastfeeding mothers before they nurse their babies. It comes with 6 extra mouthpieces which makes it easier to test your family or friends in a more sanitary way. The results are clearly displayed on a bright LCD screen and the product offers a high level of accuracy and consistency.
Pros
- Easy to use
- It has a bright easy to read LCD screen
- Comes with 6 extra mouthpieces
- High level of accuracy
Cons
- It needs to be calibrated regularly
- A bit expensive but delivers accurate reliable results
4. BACtrack C8 – Compact Smart Breathalyzer
The BACtrack C8 is a personal breathalyzer designed for both individual and professional use, utilizing BACtrack’s BluFire® fuel cell sensor for high accuracy. It connects wirelessly to smartphones, allowing users to track their BAC over time and estimate when they’ll be sober, thanks to its ZeroLine® technology. It’s portable and fits easily in a pocket or purse, making it suitable for social situations like parties or dinners.
Compared to other BACtrack models, the C8 is more portable than the S80, which is more accurate but lacks ZeroLine. It’s similar to the C6 but slightly larger, while offering the same features. Unlike the Go, it has smartphone connectivity and higher accuracy.
It seems likely that the BACtrack C8 is best for those wanting a balance of accuracy and affordability, especially for social settings where tracking BAC is helpful. It’s ideal for users who value smartphone features without needing the precision of higher-end models.
Pros
- High accuracy with BluFire® sensor
- Portable and lightweight (57g)
- Smartphone integration for tracking and ride-sharing
- ZeroLine technology estimates sobriety time
Cons
- Battery life limited to 300 tests
- Uses disposable AAA batteries, no rechargeable option
- Less accurate than top models like S80 or Trace
5. AlcoMate REVO TS200 – Easy To Re-calibrate
This is a compact sized personal breathalyzer no larger than an iPhone. It’s lightweight too and comes with one-way flow mouthpieces, batteries, and a hard Clamshell carry case. It’s easy to use and delivers results within a few seconds via a clear 4-digit screen.
How to change the fuel-cell sensor module on the AlcoMate Revo Model TS-200
Pros
- Gives you fast accurate results
- It’s easy to use
- Compact size and lightweight
- PRISM (Pre-calibrated Replaceable Intelligent Sensor Module) Technology
Cons
- The price is a little bit higher compared to other models
6. Dräger Alcotest 3820 Breathalyzer – Expensive, but good one
NHTSA-Approved
The Dräger Alcotest 3820 breathalyzer stands out as a premium device that delivers police-grade accuracy in a portable package.
The German engineering is evident in its solid build quality and precision. While it’s more expensive than typical consumer breathalyzers, the reliability and consistent results justify the investment. The device starts up quickly, provides results within seconds, and the LCD display is clear and easy to read even in low light. The protective case and hygienic mouthpiece system show thoughtful design, though you’ll need to factor in annual calibration costs. For anyone serious about responsible drinking and driving, this device provides peace of mind with its professional-grade testing capabilities.
Pros
- Exceptional accuracy and consistency. The electrochemical sensor provides police-grade results with minimal variance between consecutive tests, and the ±5% accuracy rating puts it well above typical consumer devices.
- Superior build quality and usability. The solid construction, intuitive one-button operation, and bright LCD screen make it both durable and user-friendly. The protective cap and replaceable mouthpieces ensure hygienic testing.
- Quick response time. Ready to test in under 4 seconds and delivers results in 3-10 seconds depending on BAC level, making it practical for real-world use.
Cons
- Higher maintenance requirements. The device needs annual calibration to maintain accuracy, which adds to the long-term cost of ownership and requires sending it to a service center.
- Premium price point. While the quality justifies the cost, it’s significantly more expensive than basic consumer breathalyzers, which might be a barrier for some potential buyers.
7. GDbow Digital Alcohol Tester – Fast Working Breathalyzer
The GDbow alcohol tester is a breathalyzer that works as advertised. It comes with 5 mouthpieces, a large screen, audible loudspeakers, and good battery life. It’s small, lighter, and better looking than other models. Some of its key features include a smart alarm function that uses a red light for test results higher than 0.05% BAC and a continuous drop sound. It has an energy saving auto-shutoff function that powers the device 5 seconds after you finish testing. It’s also easy to use and delivers test results in as little as 3 seconds.
Pros
- Small and portable
- Fast results
- Big screen and loudspeaker
Cons
- Doesn’t work with mouthpieces from other brands
- It’s a bit expensive but far much cheaper than the cost of a DUI.
8. AlcoHAWK Ultra Slim – Portable and Easy to Use
This is a high accuracy breathalyzer equipped with a fuel cell sensor module. It’s extremely easy to use. You just need to insert the batteries, power it on, and start testing. It comes with an automatic shut-off function. Each battery life gives you 200 tests. The batteries are included in the package. It’s one of the smallest portable breathalyzers on the market today. You easily carry it everywhere you go.
Pros
- It has high accuracy and sensitivity
- Easy to use
- Automatic shut-off to save energy
- Small and portable
Cons
- Sensitive sensors that can be damaged when you blow directly into the device
- May stop working if not used for a month or more
9. Fannel Portable Breath Alcohol Tester – Multipurpose Personal Breathalyzer
The Fannel Portable Breath Alcohol Tester is a multipurpose breathalyzer that also works as a car charger and a lifesaving hammer. It’s an easy to carry on-board alcohol tester. It gives you accurate alcohol test results indicated by green, yellow, or red lights. Green light means your alcohol level is safely below 0.02% BAC while yellow and red indicate a higher blood alcohol content of more than 0.05% BAC. It has two USB ports for fast charging and comes with overheating and short circuit protection.
Pros
- It can be used as a car charger or escape hammer
- Gives you accurate results
- It has a lightweight easily portable design
- Fast charging
Cons
- You have to wait for 5 minutes before you can test again
10. Professional Digital Breathalyzer with 5 Mouthpieces – Best for Multiple Users
This portable digital breath alcohol tester comes with 5 extra mouthpieces. It has a high accuracy level of +/-0.010% BAC and sends out a video or audio alarm to warn you if your blood alcohol level is above 0.05% BAC. This breathalyzer is powered by two AAA batteries and has an automatic shut-off system which powers off the device 5 seconds after testing.
Pros
- A fast response time of just 5 seconds
- Comes with dual input for both right and left-handed people
- It has a high accuracy detection range
- Lightweight, portable design
- It comes with 5 mouthpieces
Cons
- Batteries are not included but are readily available