Keychain Breathalyzer

Product Description

The BACtrack Keychain Breathalyzer is a revolutionary portable breathalyzer that takes size and portability to the next level. The BACtrack Keychain Breathalyzer is a fully functional breath alcohol tester with an internal alcohol sensor, folding breath tube, and even optional mouthpieces. You can quickly and easily estimate your BAC, Blood Alcohol Content, by blowing through the mouthpiece for 5 seconds. Never before has a breathalyzer had accurate alcohol sensing technology in a design this small and affordable. You can take the product everywhere and test yourself, friends, family, or anyone who is curious about their Blood Alcohol Content. The innovative folding mouthpiece pulls out during testing and slides back down during storage – it’s that easy! Everyone will want to test themselves whether you’re at a party, bar, restaurant, or anywhere else alcohol is consumed. Learn how drinking alcohol affects your Blood Alcohol Content and always make smart, informed decisions. And you can trust the BACtrack Keychain Breathalyzer because of BACtrack’s history and experience with personal and professional alcohol breathalyzers.

Features

• QUICKLY & EASILY ESTIMATE YOUR BAC - Proprietary Advanced MicroCheck Sensor technology delivers reliable, accurate BAC results you can trust
• EASY TO USE - One button operation means you simply power on your keychain breathalyzer and begin testing in seconds. It's that easy!
• TAKE IT WITH YOU ANYWHERE - The ultra-compact BACtrack breathalyzer keychain easily fits in a pocket or purse, making it a great portable breathalyzer for any occasion.
• OPTIMAL BREATH CAPTURE - The innovative fold-out mouthpiece ensures only your breath goes into the alcohol tester, while other airborne pollutants are kept out.

Top Reviews

000 and this thing is like 30.
by Arjun Chakra (5 out of 5 stars)
September 2, 2015

This thing has straight up saved my ass so many times I can't even tell you. Got pulled over last night, and I was confident I was way under the limit thanks to this little device. So far I and others have used it over 30 times and it seems to give really accurate, consistent readings. A Dui costs around 5,000 and this thing is like 30... Totally worth it!
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This is such a smart product to own
by Gail P (5 out of 5 stars)
February 28, 2018

This is such a smart product to own! We have experimented with it at home and at times when we felt fine to drive, we found out we were above the legal limit. Now we carry one with us and check ourselves anytime we have even one drink so we can make sure we are safe to drive. This could be a lifesaver! We've given them to friends for gifts. Everyone who drinks alcohol should own one.
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Great Tool -- Troubleshooting: REPLACE BATTERY
by Johnny (4 out of 5 stars)
July 25, 2013

The Keychain Breathalyzer is really a great value, but like any measuring device, you HAVE to understand a little science and how to properly use it.

When I first got this little doodad, I put the battery in and went hog playing around with it, drinking with some buddies.

The next day, it started acting really funny. It would turn on and start counting down, and then shut off almost immediately. If I left it alone for several hours, I could do a test, but then it was unable to do another test. Sometimes I could do a test and it gave me the 'Lo' message. I thought the battery was dead. I checked the battery with a volt meter, and the battery didn't look dead at all. I thought I got a lemon... and then I got a new battery. Now it's fine.

To those who have seen the "it was working great the first night, and then it quit on me" reviews, this is what's going on:

RELIABILITY:

This device seems power hungry, and I have a feeling that the AAA battery can't immediately produce the power it needs, so it needs to harvest the energy slowly while not in use so that it can do a test. I didn't like that this behavior isn't explicitly explained in the manual. The manual does say to wait a few minutes between tests. If you don't follow this, it will actually kill the battery. If you played with it non-stop all night and it won't work anymore on a seemingly good battery, replace the battery and use it properly. It will function perfectly. This is something that should be clearly addressed in the manual, and I think would eliminate the negative reviews that I have seen.

Realize, this device was designed for a responsible drinker who wants to stay safe. That person will use it perhaps 4 times at most throughout an evening.

ACCURACY:

I've never been able to measure and track the phenomenon of BAC, so I had no idea what to expect. I looked at a table of BAC's, drink units, and body weight/height to see what a standard drink should do to me. I did a proper test, where I had 1 drink unit (1 12oz can of beer in this case) and waited 20min to do a test. It matched the table perfectly. And it's very consistent. If I repeat a test, it is always within 0.01 of the last.

You don't necessarily have to wait the full 20 minutes, but there are caveats. If you are still absorbing alcohol in your GI tract, yet have absorbed all of it in your mouth and throat (you ate a big meal before drinking), the reading will be low because you haven't absorbed everything into your system yet (it will continue to rise even if you don't have another drink). If you're still absorbing alcohol in your mouth (ie. after a sip of hard liquor), it will read high because the alcohol takes longer to absorb through your mouth and throat. You can rinse your mouth and do a test to get a ROUGH idea anytime, but if you want to be sure about your reading, wait 20 minutes. If 20 minutes isn't possible and it's important, your environment isn't healthy.

CALIBRATION:

The official website says that it should be sent for calibration after 6mo - 1yr. Closer reading of the manual confirms what many professionals in the BAC field will say: Every Month. The manual states that under 'average' use, it will need to be calibrated after 6mo - 1yr. But under daily use, it may need calibration as often as once a month.

I will periodically see what it reads my BAC 20 min after 1 standard drink, and send it off when it looks inconsistent or off.

CONCLUSION:

BAC was a much simpler concept in my head until I started reading and got this doodad. You have to learn a little science to understand what is going on. But it will help you understand that "feeling OK" is often not good enough.

Really, this tool is most useful if you understand how alcohol interacts with your body. Breathalyzers are not a surefire or definitive way to measure 'drunkenness' because they are an indirect measurement that can be affected by many factors. However, if you would like a tool to give you a rough idea of what you can handle, and have the knowledge to understand what factors are at play, it's a damned educational gadget that I would recommend to anyone interested in some learnin'.

At $30, it's a great deal. If you need more accuracy, or whatever, spend the money for a fuel-cell breathalyzer and get it calibrated every month. The BACtrack keychain is a good "back of the envelope" tool that can be very educational.
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They work great but with some limitations
by Woody (3 out of 5 stars)
July 8, 2018

They work great but with some limitations. The limitations such as you have to wait 20 minutes after you had drink. You cannot use immediately after smoking cigarettes, you cannot use this immediately after eating, requires special calibration after several months makes you wonder why you purchased it in the first place.
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Works just as advertised. I've used it and compared ...
by Stephen Grechis (5 out of 5 stars)
March 13, 2018

Works just as advertised. I've used it and compared it to bar-top models and to other, bulkier models, and it seems just as accurate as long as you don't abuse it.

Lots of other reviews are saying "I used this thing three times and now it keeps returning .00 no matter what, this thing sucks". That's what will happen if you don't want the 15 minutes between drinking and testing. Surprise surprise, if you blow pure alcohol onto the sensors for alcohol, you'll throw off the calibration a little bit.

But follow the instructions, and this thing will do just what it claims to.
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Don't get
by Sarah (1 out of 5 stars)
August 17, 2018

I bought this a few months ago and have tried using it numerous time along with my friends and it either reads .00 or .01 I have never seen it above that. Even when we had been drinking all night it said it was .00 Not worth the money, use your money and put it towards a more expensive one
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For the Price, REALLY NICE
by Amazon Customer (4 out of 5 stars)
November 12, 2018

This thing is cheap, but it is semi accurate. I did not do any side by side comparison to an actual breathalyzer, but if you listen to instructions and not be a goof, the reading can be trusted to within 0.01. I think this is a really good tool to check where you are when you want to go home at the end of the night, but I wouldn't use it as an alibi in court. TL;DR, if you want to check yourself out once in a while, good investment. If you're gonna go out with a group of lads and try to get a "high score" leave your keys at home and take a taxi.
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Great for DD to influence others not to drive after drinking. Seeing those numbers is a sobering eve
by CashFlys (5 out of 5 stars)
May 31, 2017

Seems to work fairly well and the results are close to what one would calculate (body weight/consumption). You have to wait the specified time before testing (no consumption for at least 20 minutes) for it to work but it has settled some discussions and helped talk friends leaving a party out of driving so well worth it.
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Doesnt work
by Bryan (1 out of 5 stars)
December 26, 2018

Product doesnt work. I was incoherent and I blew a 0.0.
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Every friend group needs one of these
by Kharin Hanes (5 out of 5 stars)
May 7, 2019

We love this little guy. When we have people over to drink we make them use this before they drive home and it's a great safe and honestly fun way to make sure everyone is good to go. Our friends love using it and always ask us to bring it when we go out. Please be cautious of the accuracy - you have to wait 20 minutes from your last drink OR rinse your mouth out in order to get an accurate number - if not the alcohol will be too strong on your breath and it won't be accurate.

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