After a year of development the horizontal bath system, fulfilled the requirements given by MTS Inc. The horizontal bath is capable of being viewed from six sides. Protection from contaminants along with easy top loading is provided by the removable lid. Laminar flow was obtained by the use of a peristaltic pump and with the aid of a diffuser. This flow helped to obtain a temperature gradient less than +/- 1 ° C, and evaporation was determined to be minimal. The price of a single prototype was less than one half the desired cost. Since all specifications were met, the horizontal bath system enables the Tytron 250 to test materials under in vivo conditions. Final prototype was delivered to the sponsor and was received favorably.

Acknowledgements:

• This work was supported by a generous fund from MTS Inc., Eden Prairie, MN
• Custom engineering was done by Jerry Norkol, Chemical Engineering Department
• Design of the diffuser and aid in selection of controlling unit was done by Dr. Lawrence Evers
• This work was performed as a requirement for completion of senior design practicum of the Center of Biomedical Engineering