The tradition of meeting any of the holidays with a must drinking alcohol is characteristic not only for Russians, but also for many nations of the world. And everything would be fine, however control not everyone can drink alcohol. Features organism, metabolism and other factors affecting absorption alcohol, are individual, and therefore talk about any specific time during which it is not recommended to sit down steering wheel due to the presence of alcohol in the blood is impossible. It’s for this the reason many motorists prefer to have such a glove box a device like a breathalyzer with which you can instantly evaluate state of your body and determine if you can drive or you need to give the body some more amount of time to rest.
- The best manufacturers. Which brand breathalyzer to choose?
- The principle of operation and types of breathalyzers
- Types of breathalyzers
- Semiconductor breathalyzer
- Electrochemical breathalyzers
- Photometric breathalyzers
- Breathalyzer selection options
- Measurement range and units in which measurement is carried out
- Allowed number of measurements in a certain period time
- Sensor exposure method
- Accuracy of breathalyzers
The best manufacturers. Which brand breathalyzer to choose?
To choose a suitable breathalyzer is currently not no labor – a large number of devices are on the market from a variety of manufacturers. All of them are capable of performing functions, assigned to them and take measurements with a high degree accuracy. Preference should be given to those devices that are officially attorneys and who are used in various medical and law enforcement institutions for medical examinations. This, of course, is not about full laboratory complexes, portable models should be chosen following brands:
The above manufacturers produce a large number of various devices that differ in functionality and cost. For in order to make an informed choice, you should not become familiar with not only with the characteristics of a device, but also with user reviews that have one or another device.
The principle of operation and types of breathalyzers
We all know that in the process of absorption of alcohol in the blood, some of it certainly enters the lungs and is excreted out along with carbon dioxide. The more people consumed alcohol – the higher the percentage of ethyl alcohol vapor in expiration of a person. Breathalyzer is a device designed to measure the alcohol content in the exhalation of a person. For this purpose, a man on for a certain time forced to blow on a special sensor, and the device, having processed the received information, displays on screen data on the amount of alcohol. In many countries of the world an acceptable threshold is 0.3 ppm. If the indicator exceeds these figures, then the person is in a state intoxication with all the ensuing consequences.
Who can use a breathalyzer? Firstly, to the driver himself, who wants to evaluate his own condition before sitting down steering wheel. Secondly, to caring parents who do not want their children consumed alcohol-containing drinks – all that is required of the son or daughters, blow on a breathalyzer, after which everything will be on its own places. Well, and thirdly, of course, to the head of the enterprise, assessing the condition of employees or the doctor who carries out admission of drivers to the line or to the flight. Like that medical examination does not take much time and clearly shows a sober person or not really.
Despite the general principle of operation of breathalyzers, take readings such devices can be different.
Types of breathalyzers
Most budget and compact sizes that are great Suitable for ordinary household use. Usually work from batteries and cope with their tasks with interest. TO the disadvantages of such devices include low accuracy measurements and tangible error. Most budget devices such a plan, in fact, are suitable only to determine there is alcohol in the exhaled air or not, oh its specific quantities, as a rule, are not discussed.
More advanced devices based on electrochemical principle of the analysis of exhaled air. Such devices are almost always equipped with interchangeable mouthpieces for personal measurements and are characterized by high accuracy performed measurements, as evidenced by various certificates conformity issued by certification laboratories. Disadvantage such devices have one – high cost.
Devices whose operating principle is considered sufficient advanced and accurate – the accuracy of photometric devices minimal. These breathalyzers are characterized by miniature sizes, they work on batteries or internal batteries, and also from the network 12 or 220 volts. The disadvantages also include high cost and the need for regular passage service and verification, but because such models are popular used mainly among the management personnel of enterprises, you can find them in the use of police and ambulance help.
Breathalyzer selection options
In addition to the operating principle underlying the specific devices, without exception, breathalyzers have a set of specifications that directly affect functionality devices and capable of introducing restrictions on the operation of certain conditions.
Measurement range and units in which measurement is carried out
You can find a wide variety of devices on sale right now. the measuring range of which is indicated in milligrams per liter exhaled air, in ppm or as a percentage volume of alcohol to the volume of exhaled air. Translation Formulas some quantities in others exist, but they are not used quite comfortable. It is for this reason that it is best to prefer to purchasing a breathalyzer that measures in ppm. First turn, because the entire regulatory framework of state institutions “fitted” to a given unit of measurement.
Allowed number of measurements in a certain period time
The device of modern breathalyzers is such that they suggest performing a certain number of measurements per day. Excess this threshold is fraught with sensor failure and costly repair as a result. In addition, the larger the number the measurements are allowed by the device, the more expensive it is cost. However, there is a reasonable limit: if the breathalyzer bought for their own needs, a model capable of do up to 8-10 measurements per day. And vice versa, when choosing a device for industrial exploitation either for the needs of the police or health facilities should prefer a model that does not have such limitations – who knows how many dimensions will have to perform?
Sensor exposure method
This parameter distinguishes contact and contactless breathalyzers. The first imply the presence of a special disposable mouthpiece, the latter suggest that the user will blow in special hole. As a rule, contact breathalyzers are all Professional models providing high quality measurements. In contrast, contactless models are great for home use. applications and are characterized by low price.
Accuracy of breathalyzers
Regardless of the type of specific device and its principle works, all breathalyzers have a certain range of error. It is associated with the characteristics of the sensor itself, as well as with imperfect measurement conditions. However, even household semiconductor breathalyzers have a relatively small error and are able to provide quite acceptable accuracy taking measurements. Professional models that verified in special calibration centers and laboratories annually, have an error, and is completely close to zero – affects the specifics of operation, requiring the most accurate and objective results. It is for this reason that the device, at the disposal of police and ambulance officers, are checked and calibrated at intervals once a certain time span and can guarantee extreme accuracy fulfillment of the results.
In the next article, we will reveal all the secrets of the right choice. radar detector for a car.
Attention! This material is subjective opinion of the authors of the project and is not a buying guide.