Hermetically Sealed Indicator Cases are configured to suit for solder sealing. The exterior of the case is copper plated and then hand tinned. The glass is installed with an electrometric adhesive. It also guarantees a leak rate below 1 micron cubic foot per hour or, at an additional charge, below 0.1 micron cubic foot per hour.

A hermetically sealed LVDT is a very rugged sensor. They can be used in high-humidity, high vibration environments and over a wide temperature range. The metal end plates are typically TIG welded to the metal housing. One end includes a hermetically sealed connector. For TIG welding, the end plates are held against a tube that is the housing. The housing is clamped into collets to hold a motor rotates it firmly while it. A tungsten electrode is brought close to the edge where the end plate joins the housing tube. An inert gas, usually argon, flows around the tungsten electrode to eliminate oxidation of the molten metal during the welding process.

Heterogeneous Ion-Exchange Membranes are characterized by the discontinuous phase of the ion-exchange material. Heterogeneous Ion-Exchange Membranes have relatively high electrical resistance. Heterogeneous ion-exchange membranes are synthesized by solution casting techniques using polyvinyl chloride. These membranes are suitable for application in electro-membrane processes like electro-deionization, reverse osmosis or membrane electrolysis, which are used for water treatment. Heterogeneous ion exchange membranes are widely used in electro dialysis. These membranes are prepared from ion exchange resins and a film-forming polymer.