The Alco-Screen 02 is the simplest, most cost effective method of monitoring for alcohol consumption. The zero tolerance level for U.S. federally mandated DOT testing programs is .02% blood alcohol content (BAC). The Alco-Screen 02 uses this zero tolerance level (.02% BAC) as the detection level set point for the test strip resulting in the simplest method of test administration and interpretation. Alcohol detection using a saliva sample can be more sensitive and accurate compared to breath tests because the relationship between the amount of saliva alcohol content and blood alcohol content is 1:1 while with equivalent breath alcohol content it is .000048:1. 24/box