An apparatus and method for mixing/agitating microorganism culture bottles includes a wheel in which culture bottles are placed, with the wheel being set at an angle from vertical so that bottles are not inverted during rotation. A sensor such as a florescence or colorimetric sensor for carbon dioxide...http://www.google.es/patents/US5858769?utm_source=gb-gplus-sharePatente US5858769 - Device for detecting microorganisms