Pressure Transmitters

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In corrosion-proof titanium

Sensor Technology

Pressure Transmitters
Pressure Transmitters

Keller offers titanium versions of its products for use in heavily corrosive media. This metal has a host of advantages for applications under very special conditions.Titanium is used as a replacement for steel in the aerospace industry, mainly for reasons of weight. In the medical devices sector, the fact that titanium is chemically and biologically neutral is especially important. This property is due to 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 in the sector. This is why titanium is more frequently chosen 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. The development of an implantable sensor (Ø 9 mm) made of titanium has caused some attention. If a sensor of this sort is made of steel, it 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 no longer returns to its original position. By contrast, the titanium diaphragm shows no deformation up to 120 °C, which also makes stability errors much less likely than in products with steel diaphragms. This is because the modulus of elasticity is only half as high.

Posted on April 20, 2012 - (245 views)
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Keller AG Für Druckmesstechnik
St. Gallerstrasse 119 Postfach
8404 Winterthur - Switzerland
+41-52-2352525
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