Special M12 connectors for the food industry
The need to easily and thoroughly remove dirt from components is a primary requirement in the packaging and F&B industry. This applies to contact areas, as well as wet and dry areas.
- Details
- Category: Circular Connectors
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By Carlos Martinez
Lightweight, hermetically sealed connectors with copper contacts
Hermetically sealed connectors with aluminum and titanium housings and copper alloy contacts, using a unique ceramic-to-metal sealing process developed by its subsidiary Pacific Aerospace & Electronics (PA&E).
A very wide range of lightweight, hermetically sealed circular connectors, with weight savings of up to 60%, including the world's only hermetically sealed fiber optic connector. This connector line has been designed primarily for aerospace and aircraft onboard applications.
Traditional unsealed connectors, often used in onboard applications, employ copper alloy contacts (to achieve good electrical conductivity) and aluminum or composite housings (to save weight). Until now, sealed connectors, used to isolate two areas with different atmospheres, have used ferronickel alloy contacts sealed in stainless steel housings by fusing a glass bead between the contacts and the housing. The high melting point of the glass makes it impossible to use high-performance copper alloy contacts and lightweight aluminum or titanium housings, as they would melt.
To solve this problem, a ceramic sealing technology has been developed with a considerably lower melting point than glass, making it an ideal material for integrating copper alloy contacts into aluminum housings, thus combining excellent sealing levels (leakage rate less than 10-9 atm.cm3/s), significant weight savings (up to 60% compared to stainless steel housings) and excellent conductivity levels (5 times the level of ferronickel contacts).
The ceramic used is a polycrystalline material that creates a direct bond between the metal and the ceramic during fusion. This creates a gas-tight seal and provides remarkable electrical properties; its electrical resistance is 1 x 10¹⁸ W/cm, which means it provides excellent electrical insulation, even in miniature designs. These seals are also very robust and withstand high vibrations as well as mechanical or thermal shock.
Several versions of the ceramic material are available, especially suitable for use with a wide variety of materials (titanium, Inconel, platinum, etc.). It can withstand temperatures up to 500 °C without seal failure.
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