The Agilent BIO-DIS Reciprocating Cylinder Apparatus is ideal for automatic dissolution testing of dosage forms that require different types of media. It is typically used for imitating the pH changes that occur in the body and is perfectly suited for extended and sustained release dosage forms. The BIO-DIS can automatically transport samples to another row of media, simulating the gastrointestinal changes that occur in vivo. Capable of running unattended for periods of up to six days, the BIO-DIS can store up to 15 programs and provide direct control over timepoints, agitation rate, sampling rate, movement between vessel rows, hold dip time, and drain time. The BIO-DIS is designed to meet current USP Apparatus 3 and EP Reciprocating Cylinder specifications.