Electrolab, since 1984 manufactures pharmaceutical testing equipment and peristaltic pumps which are used in several industries. Electrolab presents dissolution with agilent spectrophotometer which are on-line sampling with single cell with valve or multicell with 8 cell changeover. This method uses a spectrophotometer in a closed loop system. The new high performance peristaltic pump is used for circulating the media into flow-through cells of the spectrophotometer. The microprocessor based peristaltic pump is designed to communicate directly with the spectrophotometer and collect the data for absorbance levels, which is then tabulated and printed directly. Dissolution with agilent spectrophotometer supports shimadzu 1700 spectrophotometer.