The Alcotest 7410Plus is the technological leader in handheld breath alcohol-measuring instruments. Specifically designed for Law Enforcement, the 7410Plus provides the utmost in accuracy and reliability in Evidential Breath Testing (EBT). Heated internal tubing prevents carryover readings, condensation, and contamination. The advanced dual-chambered check valve mouthpiece provides integrity never achieved before with a handheld EBT. The absolute pressure transducer automatically adjusts for altitude and ambient pressure conditions, therefore, eliminating the use of charts and calculations when performing Dry Gas Accuracy testing. With its extended memory capacity, the 7410Plus instrument can record and store up to 10,000 screening tests or approximately 600 evidential tests. The bi-directional RS-232 port allows communication between the Alcotest® 7410Plus and a PC for data uploading, software updating, and instrument control.