An alcohol tester is any device that checks for alcohol in the body, and for most buyers that means a breath tester held in one hand. The range runs from single-use tubes with color changing crystals to keychain units, phone-connected gadgets, fuel cell handhelds and professional screening devices. This page sorts those types and points to models whose makers publish enough detail to judge them, using the manufacturer's published specifications and public documentation.
BACtrack S80, a fuel cell handheld with a stated tolerance and long battery life.
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BACtrack C8, a compact fuel cell unit with its own screen and an app that keeps a history.
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BACtrack Go, a budget semiconductor keychain unit for occasional checks.
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AlcoMate Revo, a professional fuel cell tester with a precalibrated sensor module the owner swaps.
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Knowing which family a product belongs to tells you more than any marketing phrase on the box.
Saliva based screening devices also appear on the federal list of approved screening devices, but our rankings cover breath testers, where makers publish the most detail.
| Model | Sensor | Stated accuracy | Calibration | Best for |
|---|---|---|---|---|
| BACtrack S80 | Fuel cell (Xtend) | Plus or minus 0.005 at 0.100% BAC | Send-in service, maker advises at least yearly | Reliable home checks |
| BACtrack C8 | Fuel cell (BluFire) | Not published by the maker as a number | Send-in service, no model specific interval published | Phone users who want a log |
| BACtrack Go | Semiconductor | Not published by the maker | Send-in service, every 6 to 12 months per manual | Occasional rough checks |
| AlcoMate Revo | Fuel cell with swappable module | Plus or minus 0.005 at 0.10% BAC | Owner replaces the module every 1,000 tests or yearly | Small business and frequent use |
See the fuel cell vs semiconductor breathalyzer comparison if the sensor column is new to you.
The S80 sits in the maker's Pro Grade line, which BACtrack also markets for professional use.
Who it suits: a household that wants one dependable tester for years.
What to know: it is the largest unit here, it has no app, and the maker asks for a 20 minute wait after eating, drinking or smoking to protect the sensor and the result. Full details in the bactrack s80 review.
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Who it suits: someone who wants a phone history but also a reading on the device.
What to know: with no published tolerance its precision cannot be compared directly with the S80. More in the bactrack c8 review.
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Who it suits: a buyer who wants a small, low cost device for curiosity.
What to know: semiconductor sensors are the least stable type, and the manual asks for recalibration at least every six to twelve months, or as often as monthly with daily use. Our bactrack go keychain breathalyzer review covers the trade-offs.
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Who it suits: a small employer, a sober living house or a heavy user who cannot spare the tester for a service trip.
What to know: it sits in the professional price band, the replacement modules are a recurring cost, and module types differ by purchase date, so check your serial number before ordering one. See the alcomate revo review.
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A breath tester estimates blood alcohol from deep lung air. The number depends on the sensor, its calibration, how recently you drank or ate, and how you blow, and even a well kept fuel cell unit carries a margin usually quoted at one point such as 0.050 or 0.100.
This is an estimate. It cannot tell you whether you are safe or legal to drive. If you have been drinking, do not drive.
For the background on that margin, read our guide on how accurate are breathalyzers.
Still unsure? The best breathalyzer ranking groups models by use case, and the breathalyzer finder narrows them in four questions.
A fuel cell breath tester with a stated tolerance and a clear calibration service is the most dependable choice for home.
Single-use tubes only show whether breath alcohol passed the cut-off printed on the label, so they give a yes or no screen rather than a measured number.
Many makers ask for at least 15 minutes after the last drink, food, smoke or mouthwash, and BACtrack manuals ask for 20 minutes, so follow your own manual.
No, home testers are screening devices, and legal evidence comes from evidential instruments operated under formal procedures.
Every electronic breath tester drifts over time, so it needs calibration, a sensor swap or replacement on the schedule its maker sets.
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