These devices not only confirm the presence of alcohol, but also approximate the actual BAC using a built-in scale. It is DOT approved and CLIA waved. It provides accuracy equivalent to laboratory blood analysts without the need for a blood sample.
Once the test strip comes in contact with oral fluid, the color of the pad on the test strip will change based on the donor's approximate blood alcohol concentration.
The DOT approved tests works by detecting alcohol above 0.02% BAC with a simple positive or negative result. They are a non-invasive test that can be performed anywhere and is ideal for zero tolerance programs. No special training or certifications are required to use the test.