Alcohol breath tests – methods, factors and implications


When an individual is pulled over under the suspicion of driving while intoxicated, they are usually tested with the aim of determining whether they are in fact under the influence of alcohol and drugs. The majority of these breath tests are for the initial screenings, while more concrete results usually come in the form of urine or blood testing. On the most widely used testing methods is the alcohol breath test. This particular test requires an individual to blow into a small, handheld device, to provide a sample which will be analyzed for any traces of alcohol.

Breath analyzing technologies

22mbnbkBreath analyzing devices, such as Breathalysers or Intoximeters, commonly use technologies such as the fuel cell technology and infrared spectrometry, to accurately measure the levels of alcohol in one’s breath. The devices that utilize infrared spectrometry are usually used for evidential testing. On the other hand, fuel cell models are commonly used for preliminary testing on-site when an individual is stopped under the suspicion of driving under the influence of alcohol.

The mechanisms

While the exact mechanisms of these devices are perhaps too complicated to explain here, we will cover just the basics. Infrared spectrometry technology functions by measuring the exact wavelength of ethyl alcohol, which alcohol beverages contain. Fuel cell models work by turning the alcohol content into an electric current, which is then properly measured.

Not always 100% accurate

Since these breath testing devices are nothing more than just machines, they do not always produce 100% results. There are always chances of false readings occurring. A common issue with the majority of a breath analyzing devices is the fact that they do not only measure and identify the ethyl alcohol. Also, they are also known to identify other substances, as well, especially the ones that have a very similar molecular structure of ethyl alcohol.

Main factors

There are also some factors that can influence the functioning of a device and its readouts. Some of the well-known factors that could trigger a positive reading from a breathalyzer, even though an individual hasn’t had a single drink, can include the temperature of the surrounding air, that person’s diet, as well as various occupational substances. For example, a person, whose job involves being surrounded by substances, such as cleaning products or paint, can inadvertently end up inhaling them. This can cause the breathalyzer to produce positive results, despite the fact that the person hasn’t been drinking before the test. Also, individuals, who are diabetics or who are on various diets, are likely to have substantially higher acetone levels, which some breath analyzing devices can confuse with ethyl alcohol.

Human errors and false readouts

33nnnHowever, just because a person blows a breath test that ends up positive, does not mean that they will be automatically charged and convicted of Driving Under the Influence. More often than not, a simple error committed by the officer is more than enough for the charges to be dropped. Also, faulty breath testing equipment can easily malfunction and display improper readings.

In case there is a trial, a person can rely on the services of a professional DUI lawyer, who will take into account these factors, as well as any other factors. With these, a lawyer will build a strong defense against any DUI allegation.


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The utilization and coming up with the right survey software is regarded as a vital part to the market research process. During the design processes from start to finish, the survey software is considered as the best tool for the market research. Click here for more information on the survey questionnaire. Here are some of the features of programming studies;


Quality control

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Tracking respondents

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Automated Reminders and survey invitations

An opportunity for the establishment of an excellent email reminder or survey invitation is created by the ability to track respondents. During the sending of the survey invitations, reminders are incorporated to remind the respondents to respond promptly. The respondents are followed, and reminders are sent out to the individuals who do not respond. The reminder is usually automated whereby the data is sent automatically after a period of two days after receiving the first invitation.

Respondent’s data being seeded

ghghghghghghghcvcvThe process of pulling the data of the respondent and placing it in the survey is referred as seeding data. In surveys which are done a yearly basis where the respondents will be required to update their contact details, the seeding data will be vital and will prevent the frustrations of an individual refilling the data every year. Into the question boxes, the contact information of the respondents is seeded, creating and updating areas that are required to be changed. The database entries will be confirmed by the respondent if it matches one’s situation and specific factors are rated relating to the experience of an individual.