OSEE® SQM 200 or SQM 300 Detect absence/presence of invisible/clear thin films or coatings or lubricants on virtually any surface. -Monitor relative thickness of very thin films or coatings or lubricants both off-line and on-line. – Establish a quantitative measure of the level of cleanliness achieved by the current cleaning process. – Compliments our CO2 Composite Spray™ cleaning for the bench. Inspect surface cleanliness before and after cleaning. LightSPEC™ can also be added as an accessory to any SQM unit. Clean Imagineering is a value-added reseller for Photo Emission Technologies (PET)