Keller AG für Druckmesstechnik has introduced a new range of titanium pressure transmitters and pressure sensors for use in heavily corrosive media.
Titanium offers several advantages when used in applications under very special conditions. For instance, titanium is used as a replacement for steel in the aerospace industry, mainly for reasons of weight. The chemically and biologically neutral titanium is especially important in the medical devices sector.
Titanium’s corrosion-proof properties come from a permanent layer of oxide on the surface of the material. Thanks to its presence, components made of titanium will not corrode even in salt water or chlorinated water, unlike the high-grade steels that are normally used.
Titanium is therefore a preferred material for process measurement technology applications involving wastewater that may be contaminated with unknown corrosive substances. A titanium housing makes it possible to carry out hydrostatic level measurements effectively in brackish water, or even in iron chloride.
Keller’s development of an implantable sensor (Ø 9 mm) made of titanium has caused a sensation in the industry, especially for the advantages it delivers in comparison with steel. A steel sensor can only be exposed to temperatures up to a maximum of 60°C. At higher temperatures, the heat-induced expansion of the oil causes so much deformation of the steel diaphragm that it can no longer return to its original position.
On the other hand, the titanium diaphragm shows no deformation up to 120°C, which also makes stability errors much less likely than in products with steel diaphragms.
At Keller, titanium is increasingly used to manufacture high-quality pressure transmitters that meet some of the most demanding stability requirements.