Constant-Temperature Cell Holder for UV-Vis offers temperature control for both sample and reference cell holders. Maintains a sample cell and reference cell at a desired, uniform temperature by circulating constant-temperature water in the range of 5 to 90 deg. C. Cell holders accept standard cells. The water connection has an outer diameter of 6mm and 9mm (two levels). Includes the cell holder connected to a front panel with water inlet/outlet. Compatible with all UV-Vis models.