UV Penetration & Protection Test System. Fabric Samples are measured in a double beam spectrophotometer with an integrated sphere. The sample is scanned over the UVA and UVB regions of the spectrum and transmitted radiation is efficiently collected by the detector within the integrating sphere. The software calculates UV penetration factors and sun protection factors from the scan data. It runs on a PC under Microsoft Windows and controls the spectrophotometer, automates the measurement process and generates a printed report. PC and printer not included.