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Readings may be affected by factors including, but not limited to, recent alcohol consumption, residual mouth alcohol, food intake, smoking, mouthwash or oral products, environmental alcohol vapours, temperature, humidity, improper breath technique, improper storage, or failure to follow instructions. Users should wait at least 20–30 minutes after eating, drinking alcohol, smoking, or using oral products before testing to reduce the risk of inaccurate readings or sensor damage. Alcohol levels may continue to rise after drinking has ceased and as a result, reflect only the moment of testing. The device uses fuel-cell sensor technology designed to detect ethanol specifically.
While fuel-cell technology reduces cross-sensitivity compared with semiconductor sensors, the presence of non-ethanol alcohols (including methanol or isopropanol) or high concentrations of certain volatile organic compounds may influence readings. Certain medical or physiological conditions, including diabetes, ketosis, ketoacidosis, or other metabolic states, may produce breath compounds that could affect results. Alcohol limits vary by jurisdiction, and users are solely responsible for understanding and complying with applicable laws. Alert thresholds within the device are userconfigurable and do not replace legal limits. Like all precision instruments, the device requires periodic calibration and, where applicable, sensor replacement to maintain performance, and improper use or failure to follow instructions may affect accuracy