Using an optic system of a well-established JASCO analytical-scale HPLC UV detector and attaching a high-performance capillary cell to it has made it possible to obtain stable data. Two types of capillary cells with low diffusion, low noise,low drift and high sensitivity are available, 16nl (50μm internal diameter) and 35nl (75μm internal diameter). The micro21UV- 01 utilizes a Deuterium lamp to cover the range of 190 to 600nm. For enhanced performance in the visible range the micro21UV- 02 has both Deuterium and Halogen sources covering the range of 190 to 900 nm.