: The Department of Transportation and the National Highway Traffic Safety Administration maintain a Conforming Products List (CPL) for alcohol screening devices. A device on this list has met rigorous evidentiary standards. 3. Consider Calibration and Maintenance
: These are the gold standard, used by law enforcement and medical professionals. They are specific to alcohol and do not react to "false positives" like acetone (often found in the breath of individuals on high-protein diets or with diabetes). They offer high accuracy and long-term stability.
: Options range from keychain-sized devices to smartphone-connected units and professional handhelds. how to buy a breathalyzer
To ensure a device is reliable, look for official regulatory approvals:
: Generally found in lower-cost, consumer-grade models. While more affordable, they are more prone to false positives and require more frequent calibration. These are best for casual, "rule of thumb" personal monitoring rather than precise clinical needs. 2. Check for Certifications : The Department of Transportation and the National
Depending on your lifestyle, certain physical features may be more important:
: Ensure the device uses hygienic, replaceable mouthpieces if you plan on testing multiple people. 5. Intended Use and Budget Consider Calibration and Maintenance : These are the
: Most fuel cell models require calibration every 6–12 months or after a certain number of tests (e.g., 500-1,000). 4. Evaluate Portability and Features