Most breathalyzers come with their instructions on how to use it. There are many vital things to consider before using it on a person to ensure that the results are excellent — this time, we present to you how to use a breathalyzer correctly.
Indications for using a Breathalyzer
- Wait at least 20 minutes after eating or drinking before doing the test with the alcoholometer. The alcohol that remains in your mouth or excess saliva can intervene in reading. This includes alcohol that is used in mouth rinses or similar products.
- Avoid using the breathalyzer when there is a lot of wind or in confined spaces. Inadequate ventilation can also interfere with the test. (We recommend you read: What is a breathalyzer ?)
- Do not blow smoke, saliva, or other contaminants on the nozzle or the piece that goes in the mouth because the sensor may be damaged.
- Do not use the breathalyzer as a tool to take and handle
- Keep it out of extreme temperatures and out of reach of children.
How to use a breathalyzer?
First of all, you will always have to read the breathalyzer manual before proceeding with the test to ensure an optimal result. The breathalyzer measures the concentration of alcohol in the expired air, so you will need to blow into the device for about 10 seconds to get a reliable result.
With a chemical breathalyzer
- Check the expiry date; if it is exceeded, no need to test, the result will not be reliable.
- Prepare the tube. Depending on the model, it will break the ends or exert pressure.
- Some models contain white crystals (to fight against moisture). It will be necessary at this time to remove them.
- Take a deep breath and blow until the ball is full. Be careful; you have to do it in one breath.
- Place the plastic tip that will test the air in the hole provided for this purpose. Refer to the manual to be sure to put it in the right direction.
- Deflate the balloon gently by squeezing it between your hands; all the air must pass through the tube.
- All you have to do is read the result: if the crystals stay yellow, no problem, you can drive! If a green color appears, you can drive if and only if it does not exceed the red line symbolizing the legal threshold.
With an electronic breathalyzer
- Be sure to use a new tip, place it on the device.
- Please turn on the alcohol tester and let it warm up. Depending on the model, this step can take a few seconds to a few minutes.
- When the breathalyzer is ready, it tells you that you can start. It will then blow for 10 seconds and a single inspiration for the test to be reliable.
- The result will then be given on the digital screen, most of the time in mg / L of exhaled air (the legal threshold is then 0.25).
To be sure of the result, you will also have to wait 20 to 30 minutes after your last sip of liquor if you took it alone or 1h after your previous sip if the consumption was made during a meal. Indeed, it is at this moment that the concentration of alcohol in the body will be maximum. It is also advisable to store and use this type of device in temperatures, not below -10 ° C and above 40 ° C.
Messages that appear on the breathalyzer
If you see that “blow” or “flow” appears on the screen, the breath sample was either not strong enough or more likely was not enough. You must provide a constant and robust sample of breath, and you should not stop blowing until you hear the beep or long sound.
If you see “battery” or “bat” on the screen, the battery is low. Please change the batteries.
Drunk driving, limits quickly reached!
Two glasses are enough. The maximum blood alcohol tolerance at the steering wheel is 0.50 g per liter of blood, i.e., 0.25 mg per liter of exhaled air. A middleweight individual reaches this threshold after consuming about two glasses of alcohol. The body takes an average of one hour to degrade the equivalent of a lens.
The visual field shrinks from 0.5 g of alcohol in the blood. Vigilance decreases, reaction time increases, and distances are less well perceived.
30% of fatal accidents in the USA are due to alcohol.
Tips when using a breathalyzer
If you feel that the breathalyzer is giving very high results, the sensor may be oversaturated from a previous test.
Turn on the device, let the count begin to lower, and let the machine run out of time. It would help if you did not blow on the breathalyzer. Repeat this several times and then perform a test.