The Z dimension is the height from the bottom of the cell to the center of its sample chamber. In case of using a small volume cell in a spectrophotometer or fluorimeter, the Z dimension of the cell should be the same as the height of the instrument’s light beam. The height of the light beam is usually 8.5mm or 15mm,20mm, depending oh the manufacturer. When ordering a cell which has more than one Z dimension available, it is necessary to specify the required Z dimension.

 Z dimension.

Z dimension.