EDIT:

The law is complicated on this topic and it varies by region. I didn’t think this needed saying when I made the post, but this isnt an end all be all on the topic, it’s just something I found interesting & posted it to c/Today I Learned.

Don’t take legal advice from a Lemmy post. Talk to a lawyer.


The Purpose of Portable Breath Tests

Portable breath tests are commonly used by law enforcement officers to quickly estimate a person’s blood alcohol content (BAC) at the scene of a suspected DUI offense. These handheld devices are designed to provide immediate results, helping officers in their decision-making process during a traffic stop or investigation.

It is essential to understand that a portable breath test is different from the more accurate breathalyzer devices used at police stations or during formal chemical testing. While portable breath tests can provide an initial indication of a person’s intoxication level, they should not be considered as wholly accurate or infallible.

https://rhilllaw.com/blog/2021/03/can-a-portable-breath-test-be-used-in-court/

  • Grabthar@lemmy.world
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    9 hours ago

    A related TIL is that none of these machines are built to detect blood alcohol levels. They detect any dissolved organic compound with a methyl group, most of which get absorbed into the blood orders of magnitude more easily than alcohol. Working with VOCs in an enclosed space without PPE can make you blow drunk on these. A good reason to demand a blood test when you know the machine is wrong.

  • Hawk@lemmy.dbzer0.com
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    10 hours ago

    From the shit I’ve seen in the US, none of these years even matter. If the cop has made his decision that your drunk, he’ll keep administering you dumb subjective tests and fail you for the slightest mistake.

    • galaxy_nova@lemmy.world
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      15 hours ago

      Even better, don’t drink at all don’t drive at all. At least if you live somewhere walkable. Tasty juice for me at the bars I guess (why are all the NA options just beer)

      • anamethatisnt@sopuli.xyz
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        15 hours ago

        I don’t see any chance of making humans stop using drugs.
        I mean it’s not like we’re alone in chasing that high either, you can find dolphins chewing on pufferfish, reindeers enjoying fly agaric toadstools, elks getting high on fermented apples, wallabies eating opium poppies and so on.

        I think teaching responsible use and having proper help available for those that need it is the only real way to handle alcohol and drugs in society.

        • galaxy_nova@lemmy.world
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          15 hours ago

          Oh yeah no I totally agree, I was mostly referring to myself, as I personally don’t do either. I don’t begrudge people who do as long as they’re responsible. Caffeine is a drug too I don’t think anyone is soap boxing that one. I only have issue with others choices affecting my own personal ones I.e. insane amounts of secondhand smoke for example.

          • anamethatisnt@sopuli.xyz
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            12 hours ago

            lol, depending on which side of the pond we’re talking about that statement would fit my whole country.

        • galaxy_nova@lemmy.world
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          8 hours ago

          That’s the “tasty juice” I coyly allude to. I was mostly referring to the lack of the emulation of hard liquors or at least ones that you can buy at a bar.

        • anamethatisnt@sopuli.xyz
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          11 hours ago

          While 0% Gin has been way too sweet when tasting it as is it works remarkably well with tonic to make a GT non-alcoholic.

  • Yggstyle@lemmy.world
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    17 hours ago

    Prolly should heavily fact check this for your area if you plan to either deny the test … or take the test while believing you can utter some magic words to make the results inadmissible.

      • Yggstyle@lemmy.world
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        15 hours ago

        I’d like to imagine this is an 80s flick with a bridge out sign resulting in some impossible hang time.

    • [deleted]@piefed.world
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      14 hours ago

      In my US state refusing to take a sobriety test in any form is punishable on its own. It doesn’t matter whether or not the test would be admissible in court.

      • Yggstyle@lemmy.world
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        13 hours ago

        Theres a number of recommendations for that situation depending on state. And of course if youve actually had anything to drink. But yup. Definitely a perfect example.

    • ZoteTheMighty@lemmy.zip
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      10 hours ago

      Refusing a test is always worst-case scenario. It’s immediately considered as if you failed the test. The distinction made here is that the handheld meters aren’t as accurate, and can’t be admitted into evidence in court, so you should never refuse one.

      • lemming741@lemmy.world
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        42 minutes ago

        Nope. They’ll say you tested positive for alcohol. The specific number won’t be used, only the detected presence.

      • Yggstyle@lemmy.world
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        9 hours ago

        If memory serves (depends, check for your area) if you are going to be tested - demand blood because it takes longer and is more accurate so it provides an opportunity to process a bit more alcohol and isnt a refusal.

  • quediuspayu@lemmy.dbzer0.com
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    17 hours ago

    Where I live if you test positive with the portable one they make you wait 20 minutes and take a second test on a bigger machine. I’ve heard you can then challenge that second test with a blood test but they don’t usually end well.

    Refusing to take the breath test will bring you penal charges.

    • oats@piefed.zip
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      18 hours ago

      Over here breathalysers are admissible, but you can reject to use them. Police then has to decide wether to call a doctor to draw blood.

    • fizzle@quokk.au
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      17 hours ago

      In my non-us country portable ones are not admissible. They take you to the station to blow into the big machine. You can refuse of course but that doesn’t lead to anything good.

  • usernametbd@lemmy.zip
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    17 hours ago

    Always refuse the field test and force them to use the one at the station - then your lawyer should ask for calibration records if you blow above - if these aren’t up to date (which isn’t uncommon) - the results could get thrown out. Don’t admit to shit. Never volunteer info to the police - keep your mouth shut.

  • Mitchie151@lemmy.world
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    18 hours ago

    In Australia, though it might vary from state to state, you can request a blood test. If there’s no booze bus right there in which they’ll take it, you might be able to make the cop go to the pathologist with you within a few hours during which you might dip under the limit if it was borderline. Never heard of anyone actually pulling this stunt, I’m sure it would royally piss off the cop.

    • Björn@swg-empire.de
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      18 hours ago

      In Germany as well. But the blood test actually requires a judge to sign off (unless you do it voluntary).

      Just say no to drug tests! Especially if you have time and the cops don’t. They will usually let you go about your day as they would rather keep doing the breathaliser test with people who don’t know that they can just refuse.

  • 11111one11111@lemmy.world
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    17 hours ago

    In non-nyc new york state (idk fuckall about nyc laws) they dont even read out the bac it just signals yes there is alcohol present or no there is no alcohol. Then you go to the precent and they test you there with a machine that give the bac%.

  • socsa@piefed.social
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    15 hours ago

    Normally there are several different crimes you can be charged with for DUI/DWI which range from basically the cop just testifying that you are impaired, to actual scientific demonstration of impairment. Things like the field sobriety tests and portable breathalyzers just provide subjective evidence the cop can lean on to charge you under some impairment statute which doesn’t require a blood draw or other lab calibrated test.

  • Sir. Haxalot@nord.pub
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    17 hours ago

    So? Isn’t it standard practice that if you’re determined to be DUI you’re arrested, taken to the station, and have to retake the test on the accurate machine which is admissible in court? I guess this might vary by region though.