Integrating sphere attachment Shimadzu ISR-603, 3-Detector 60 mm diameter (220nm to 2600nm for UV3600Plus), used for total diffuse transmission or reflecatance measurements of liquid or solid samples. The specular components can also be measured. Equiped with three detectors (photomultiplier tube, an InGaAs detector, and a PbS detector), this accessory offers unique optimized sensitivity across a large wavelength range.