AlcoMate Revo Professional Fuel-Cell Breathalyzer | Accuracy with Patented Replaceable Fuel-Cell Sensors | Replace Sensors, Precisioin Sustained | DOT & US Coast Guard Certified | FDA 510(k) Cleared

**Update II - 01/22/2020Raised my 2 star rating to 4.The new sensor came and it behaves generally the same way which I believe is just the way this technology works.I tried my friend's $45 breathalyzer and it gave readings that were less accurate than the AlcoMate by quite a lot actually. I blew into the Revo and it showed me at .110 consistently where my friend's was showing .08 or .09So while this breathalyzer won't pick up a single beer that you drank 30 minutes ago.. It will be accurate when rating multiple drinks that are sitting in your stomach. (Which is why this is less reliable than I thought it'd be) that alcohol in your stomach obviously hasn't made it to your bloodstream yet, so checking alcohol via breathe isn't super accurate.Funny... I did use mouthwash a few days ago and after about 10 minutes I blew and it read .180!! yes! lol I hadn't drank at all that day or the day prior so I clearly wasn't drunk.... But if I blew for a cop I would've gone to jail lol.I'll be keeping my Revo and we use it at parties and stuff to see what are levels are at. After 3-4 beers in a couple hours, it picks up accurate numbers.**Update I - 01/15/2020Yesterday I had a few beers at a friends house. 2x8oz beers, low alcohol content maybe 4-5% each.an hour after my last beer I blew and got 0.000 oh okay I guess that's normal!.Got home, had a 2oz gin martini. Waited 20 minutes... blew... 0.000 well that's weird!!!.I took a shot of gin (this science experiment makes me feel funny) blew with alcohol on my breath... okay it reads 0.32 which makes sense cuz it's in my mouth still... Waited 5 minutes and blew .012 hmm that seems incredibly low considering how much alcohol should be in my stomach. I tried all sorts of blowing techniques - Hyperventilating, blowing the end of my breath, taking a big breath in before exhaling. They all came up low or near 0.000.I'm 25 years old, 6' tall 190lbs I'm overweight by about 15lbs. I don't metabolize THAT great lol there should be higher readings...... I e-mailed their support address, person responded next morning and asked me to call. I spoke to a gentleman who was very nice. He asked me to check the expiration on the back of the sensor module inside. It says 03/2021. He thought for a moment and asked if I could take a picture of that and that he would send a new sensor module as this one appears defective....This disappointing for something that has been used maybe 15 times (it came with 4 blows on it already which is odd as it shouldn't have been a refurb) and is so expensive. My friends have keychain or other cheap $30 breathalyzers that they say are accurate... I was hoping this would last years without being inaccurate....Dropping my review from 5 start to 2 stars until I get the new module and see if that is more accurate for HOPEFULLY more than a few days.**Original Review:On the AlcoMate page they still advertise this for $200+ so what a steal from Amazon!It is smaller than I expected it to be. It's also very lightweight. Some might call it cheap feeling, but I like knowing it's not clunky and bulky. I ordered this to be able to gauge my inebriation throughout a night. I tend to get ahead of myself and would like some sobering facts to give me that "slow down!" message that I sometimes need....Well what better way to test it than pouring a martini!3 ounces if Gin, 1 of dry vermouth and a splash of olive juice. When the final sip was taken I set a timer for 20 minutes. I waited another 2 just for the sake of giving it time.I blew til the beeping stopped and I heard a click...Okay it saysCalculating....035...It worked!I waited another 20 minutes or so and blew again....... 030...Another 20 minutes.... 025! Perfect!.That is about what I'd expect!Going in the right direction!...As you can see this was a very non-scientific test.But it worked exactly as expected...The packaging came with 5 mouth pieces which will be fine for my use.It does warn not to use this to determine if you should drive. I agree. However I do think it's a good test of, "are you more drunk than you think you are?" that could give u a bit of a wakeup call when you think you're nearly sober. You may then say okay I'll not have that next drink or swap in a glass or two of water. All good things!..Be safe and I hope this review helps you in some way.

Great machine

My girlfriend and I bought this to ensure we are not over the legal limit before driving. Here’s what the device taught us: you have to drink a lot to get to that point. And I mean a lot. Like, if you can read this without vomiting down your pants, you are good to drive. Here’s another test: if you can remember one of your mother’s names, then you are free and clear to drive.

This one is a little more expensive but seems to be a lot more accurate than the other model I tried and doesn’t very when you blow into it numerous times

Great purchase for the price works great!

Works as advertised...

Easy to use. Product gives fast readings. Makes me feel safe knowing I have one in my car at all times for my family,friends and myself.

Easy to use!! super accurate. slim. Fits in purse or pocket or glovebox.