The quality of air, with respect to containment can be determined if necessary. Optical instruments, which size and quantify particulates, are available together with technical personnel to sample and evaluate findings and report on equipment function. Repairs can be made to filters and systems to improve air quality as a result of such testing. The procedures for cleanroom testing and air quality assessment are under constant review to reflect technical advances in filter performance and improved instrumentation. CON-TEST is continually upgrading its' competence in this challenging discipline to provide state of the art service to its clients who need an independent opinion.