Hermeticity-Hermetically sealed synthetic sapphire window exhibits a maximum leak rate of 1 X 10^-9cc helium/second

Mechanical Strength-Sapphire has burst strength many times greater than quartz or glass

Thermal Characteristics-Operating range from +500ºC to -70ºC

High Pressures-Pressures to 10,000 psi

Chemical Inertness-Sapphire is more chemically inert than glass or quartz and is not affected by acids, strong alkalis or organic solvents

Range of Frequency Transmission-Sapphire permits operation over a wide range of spectra from ultraviolet to infrared