The devices are ideal for use in hermetic sealing applications in harsh environments, such as submarines, satellites, underground applications, vacuum chambers, laboratory equipment, and commercial and military aircraft.
Glenair's airtight glass-seal connectors offer exceptional resistance to extreme operating temperatures, from -180°C to +260°C; excellent mechanical strength; and no material degradation or aging over time. The helium leakage rate is very low, ranging from <1 x 10⁻⁷ cc/s to 1 x 10⁻¹⁰.
All hermetic connectors are 100% tested before shipment. A helium leak test is performed to certify hermeticity. This test is conducted by inducing a vacuum of 1 ATM on one side of the connector. Helium gas is released on the other side, and a mass spectrometer counts the number of helium molecules that penetrate the connector seal. The helium leak test takes advantage of the small size of a helium molecule compared to air or water vapor. Helium is inert, rare in our atmosphere, and easily detected with a mass spectrometer.
Glenair manufactures glass-sealed airtight connectors in the USA and Italy for all Mil and EN standard designs and for new custom designs.

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