Laboratory Enterprises Manufacturing reinvented diffusion cell apparatus is used to study of trans-dermal properties of pharmaceutical substances in the pharmacy colleges, medical research institutes and pharmaceutical industries. Having 6–stages diffusion cell apparatus & 8-stages diffusion cell apparatus, user can drive each stirrer stage at different RPM from 50 RPM to 950 RPM, diffusion cell apparatus provided with water circulation system to maintain uniform temperature throughout all diffusion cells, water circulation system consists of water circulation pump which circulate water to all diffusion cells, and get back to maintain temperature.