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Breathalyzer

Old 09-05-2015, 10:20 PM
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I got a breathalyzer as an impulse buy and took it to a cookout tonight. Several people tried it and results varied from .11 - .24. I'm to the point in my life that the lower the number the better. I've always thought .08 was the legal limit, but apparently I'm wrong. Question:

What is the highest # you'd drive on?

What would you expect to blow after a full day of "vacation" (numerical answers only)?

Are these things accurate?
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Last edited by creekman; 09-06-2015 at 08:36 AM.
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Old 09-05-2015, 11:06 PM
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Well if you take one sip of beer you'll blow a .06+ reason being is its your BREATH level alcohol not blood so I doubt that was accurate at all.

You can chug a cup of water and blow half of what your blood is. I been using one for about 6 years. It's just a gauge.

Either way, I would try my hardest to be sure I was 100% sure I was under .08. It's best to wait about 30 minutes. Maybe rinse your mouth out with water.

Take a sip of booze don't even swallow it and you'll think you are dead.. lol
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Old 09-06-2015, 06:13 AM
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I have thought about buying one for demonstration in my Teen Driving School and to just kind of check and see what I blow when around the house after having a drink or two

In our classroom we discuss in DETAIL the consequences of drinking and driving in detail and when I quiz them virtually ALL know teens that drive after drinking as well as witness their parents do the same
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Old 09-06-2015, 07:13 AM
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Originally Posted by creekman View Post
I got a breathalyzer as an impulse buy and took it to a cookout tonight. Several people tried it and results varied from 1.1 - 2.4. I'm to the point in my life that the lower the number the better. I've always thought .08 was the legal limit, but apparently I'm wrong. Question:

What is the highest # you'd drive on?

What would you expect to blow after a full day of "vacation" (numerical answers only)?

Are these things accurate?
.08 is the legal limit in most states ... and that's mainly due to Federal Highway funds being attached to having that set as a state law. Each state can set its own law, but the Feds will withhold funding if you don't comply.

Why would you even drive on anything close to the legal limit?

Everyone is going to vary widely "after a full day of vacation" there are many factors that go into how one's individual metabolism processes alcohol. Male/Female, Time, Amount Consumed, Food Content will all factor into your "results." Widmark's formual gives you a basic understanding of what goes into the actual "results" ... BAC = [Alcohol consumed in grams / (Body weight in grams x r)] x 100. In this formula, “r” is the gender constant: r = 0.55 for females and 0.68 for males. (For further explanation: http://www.wikihow.com/Calculate-Blo...dmark-Formula)

In addition, alcohol kinda works like a "Bell Curve" while you are drinking ... you are going to be going up, until you peak after drinking then come back down hitting the same "number" twice in the processes of expelling the alcohol from your system.

"Are these things accurate" .... that depends on ALOT of factors. First the quality of the specific unit you purchase, how that unit is maintained, how the test is administered. They are referred to as PBT in the field, Preliminary Breath Test. Most courts around the country do not allow them as evidence due to the wide range of results. Departments will use them as a "tool" but for court purposes most require a result from an Intoximeter that is maintained in a controlled environment under strict control & maintenance administered by a certified operator.

If you want to use it as a "gauge" and to get your "most accurate" result ... keep the unit at room temperature, wait at least 20 minutes with nothing in the test subjects mouth (to allow dissipation of mouth alcohol content) have the test subject take a deep breath, hold it for a moment then blow out steady (not hard & fast) and wait to they have expelled almost all of their air then press the sample button to get the deep lung air sample.

Problem is when you take these things to parties, it becomes a "game" to see who can blow the highest ... and thats ok too, as long as they aren't driving ANYTHING.
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Old 09-06-2015, 07:38 AM
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If people were blowing 1.1-2.4 on an accurate breathalyzer, they should be dead! You've either misplaced the decimal point or the meter is wildly inaccurate.

My target BAC range for driving is 0.00% (although anything under 0.02% is no different than 0.00%, given the accuracy of BAC measurement). If I drink, I don't drive until the alcohol has time to metabolize, that simple. BAC metabolizes at 0.016%/hour, regardless of the size of the individual.
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Old 09-06-2015, 08:18 AM
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Originally Posted by williamwallus View Post
Well if you take one sip of beer you'll blow a .06+ reason being is its your BREATH level alcohol not blood so I doubt that was accurate at all.

You can chug a cup of water and blow half of what your blood is. I been using one for about 6 years. It's just a gauge.

Either way, I would try my hardest to be sure I was 100% sure I was under .08. It's best to wait about 30 minutes. Maybe rinse your mouth out with water.

Take a sip of booze don't even swallow it and you'll think you are dead.. lol
How would you neutralize the air in the lungs? That's were the breathalyzer is getting it from. Not your mouth. That's why they have you blowing for awhile.
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Old 09-06-2015, 08:21 AM
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.08 is just a good hangover.
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Old 09-06-2015, 08:39 AM
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Originally Posted by yarcraft91 View Post
If people were blowing 1.1-2.4 on an accurate breathalyzer, they should be dead! You've either misplaced the decimal point or the meter is wildly inaccurate
Touche, fixed it thanks.
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Old 09-06-2015, 08:56 AM
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Originally Posted by creekman View Post
Touche, fixed it thanks.
Whew! Those numbers look more believable. .

Assuming the meter is accurate and the test conducted properly, 0.24% is still seriously drunk, "falling down drunk" for many people and bordering on dangerous to health.
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Old 09-06-2015, 09:29 AM
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Originally Posted by yarcraft91 View Post
Whew! Those numbers look more believable. .

Assuming the meter is accurate and the test conducted properly, 0.24% is still seriously drunk, "falling down drunk" for many people and bordering on dangerous to health.
The .24 person is one of those "I don't really drink any more people, that keeps a 1 Oz glass behind a picture frame all night. Probably didn't go 20 mins without a sip all night, but doesn't drink much....

The whole experiment was eye opening to a few, and pissed a few others off. Very entertaining to watch reactions IMO. None of us wanted the high number.
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Old 09-06-2015, 10:17 AM
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Buddy of mine several years back, stone-cold alkie (good part of why we're not friends anymore) got stopped and blew a .34 on a real breathalyzer machine an hour later..

,34 is like legally dead, I think.
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Old 09-06-2015, 10:29 AM
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Originally Posted by Thalasso View Post
How would you neutralize the air in the lungs? That's were the breathalyzer is getting it from. Not your mouth. That's why they have you blowing for awhile.
I'm not really sure. I guess your mouth and throat absorb it from the water? Try it.
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Old 09-06-2015, 06:12 PM
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.08 is, the legal limit. Those "over the counter" machines are accurate in that they do tell you that you have alcohol in your blood. The ones we use are calibrated before each test on an arrestee. There is a waiting period for 15 minutes before a breath sample is taken. Also the subject must not burp, or the 15 minutes starts all over again. The reason for this is to make sure that the machine measures the breath sample and not the alcohol that is burped up into your mouth from your stomach. If you usee an over the counter machine, I would use it as a gauge for a BAC, but only after I had stopped drinking for at least an hour
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Old 09-07-2015, 05:37 AM
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Yeah I have one, I use it but I take it with a grain of salt... I don't drink and drive at all, not ever! That's how I avoid a DUI.. I do drink but one beer and you won't see me behind the wheel for at least an hour... Just easier to avoid all the bs all together. I will tie one on here and there but never get behind the wheel.
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Old 09-07-2015, 05:39 AM
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I bought one that's certified for employee use.

It requires you to wait 20 minutes before blowing into it after drinking.

I did my own testing at home.
I drank a six pack of sweet water 420 in two hours and blew a .06.
Then I tested it again 30 minutes later and it went up to .08.
Then 30 minutes later it came back down to .06.
I'm 275lb.

The thing it helped me realize was I really do have a buzz at .08. I always thought .08 was ridiculous and it only took a beer or two it hit it. I was wrong.
I'd never drive after drinking that much anyways, even before the testing.
I will have a beer or two at dinner and drive home.
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Old 09-07-2015, 07:13 AM
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Just don't drive after you drink and it won't matter how accurate the gauge is.
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Old 09-07-2015, 01:03 PM
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Originally Posted by The Revenge View Post
I bought one that's certified for employee use.

It requires you to wait 20 minutes before blowing into it after drinking.

I did my own testing at home.
I drank a six pack of sweet water 420 in two hours and blew a .06.
Then I tested it again 30 minutes later and it went up to .08.
Then 30 minutes later it came back down to .06.
I'm 275lb.

The thing it helped me realize was I really do have a buzz at .08. I always thought .08 was ridiculous and it only took a beer or two it hit it. I was wrong.
I'd never drive after drinking that much anyways, even before the testing.
I will have a beer or two at dinner and drive home.
Those numbers are believable. Were those Sweetwater 420s the 16 oz size?
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Old 09-07-2015, 01:11 PM
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Originally Posted by yarcraft91 View Post
Those numbers are believable. Were those Sweetwater 420s the 16 oz size?
12oz bottles
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Old 09-07-2015, 01:24 PM
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Six pack of 12 oz Sweetwater 420 (5.7% alcohol), consumed in 2 hours, 275 lb male calculates as a BAC of 0.07%. The meter read 0.06 to 0.08%, which is pretty much on the money for that BAC measurement technique.
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Old 09-07-2015, 02:01 PM
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Originally Posted by yarcraft91 View Post
Six pack of 12 oz Sweetwater 420 (5.7% alcohol), consumed in 2 hours, 275 lb male calculates as a BAC of 0.07%. The meter read 0.06 to 0.08%, which is pretty much on the money for that BAC measurement technique.
That's interesting.
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