Photon Technology International, Inc. designs, manufactures and markets proprietary electro-optical instruments. Providing fluorescence solutions for over 25 years, our products are used in leading laboratories around the world for medical research, health care, industrial process, quality control, environmental science and other applications. PTI distinguishes itself in the photonics industry by devoting its resources exclusively to the technology of fluorescence instrumentation and by providing exceptional product support. With offices worldwide, PTI has been recognized for outstanding technological achievement, business growth and corporate environment. PTI has three primary product lines, each of which addresses a particular "flavor" of fluorescence research: QuantaMaster, TimeMaster and RatioMaster. The QuantaMaster series is a fluorescence spectrofluorometer. The TimeMaster series is a lifetime spectrofluormeter. The RatioMaster series does fluorescence microscopy. All of our products are built with an open architecture design giving our customers the ability to configure a system to fit their specific needs.