EBTs are typically more accurate machines that police keep at that station, whereas PAS devices are less accurate but are more portable. All breathalyzers have an inherent margin of error.
How to Beat a Breathalyzer Test. The one action you can take that will reduce your apparent BAC on the Breathalyzer test is to hyperventilate before taking the test. What you are doing here is replacing the alcoholic gas in your lungs with as much fresh air as possible. While this will reduce your BAC test value by up to 10%, you'll still test ...
You need a more objective method of gauging your sobriety — and blowing into a breathalyzer is one of the simplest ways to confirm you're good to drive. A reliable and accurate device will tell you within 30 seconds if your BAC is as low as you feel or whether you should just hang out for another hour.
To beat a breathalyzer, do your best to avoid the test altogether by cooperating when you're pulled over by police. Be courteous and answer questions politely, but avoid offering up any incriminating information about how much you've had to drink.
doc for "breathalyzer test results scale".(Page 1 of about 18 results)