Calcium Fluoride (CaF2) has long been used in research applications. It performs best in controlled environments where humidity, chemical exposure, vibration and high frequency noise are minimized or eliminated. The transmission rate characteristics of CaF2 are suitable for higher temperature applications, shortwave and midwave thermography and for the visual spectrum. Medium to longwave transmission rates (7-14 micron) are typically between 40-50% based on the infrared (IR) camera detector sensitivities at different wavelengths. VPFC Series (Viewing Pane Fixed Crystal) IR windows are specially coated to reduce the transmission drift due to moisture\/humidity. However, industrial users are strongly encouraged to investigate the VPT Series of industrial-grade IR windows which are specifically designed for stability in harsh industrial environments and have an unconditional lifetime warranty. When purchasing crystal windows, ask for the Material Safety Data Sheet (MSDS) to ensure that the crystal does not contain hazardous substances. Some window manufacturers use crystals made of Barium Flouride (BaF2), a toxic substance, especially hazardous to the food and beverage industry.","VPFC Series (Viewing Pane Fixed Crystal) 2’’, 3’’, 4’’ infrared (IR) windows are specially coated to reduce the transmission drift due to moisture\/humidity.","Calcium Fluoride (CaF2) has long been used in research applications. It performs best in controlled environments where humidity, chemical exposure, vibration and high frequency noise are minimized or eliminated.","IRISS VPFC Series windows allow for visual inspection, are compatible with all IR cameras and housing is made of switchgear-grade plastics, insulated to 30kV\/mm. non-conductive and UL 94 compliant.","The VPFC Series is available with an Easy-Grip™ stainless steel cover. This lockable cover maintains IP65\/NEMA 4 seal when closed.","Unconditional lifetime warranty applies not only to the workmanship of the window housing but also applies to the durability and stability of the optic in the proposed environment.","IRISS manufactures and assembles all products at our global headquarters located in Bradenton, FL.