An automated system for blood sterility testing. High-fluorescent technology allows you to detect positive samples faster. A bottle with a BD BACTEC ™ nutritional medium employs a sensor that responds to CO2 released by microorganisms. Photodetectors measure the level of fluorescence, which depends on the amount of CO2 emitted. Further, these measurements are interpreted by the device in accordance with the criteria of the program analyzer. When positive cultures are detected, the device immediately reports this with light and sound signals and displays the data on the monitor.