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Supporting finite element analysis of offshore structures

Oilfield Technology,

Due to its high accuracy and long-term reliability when operating in water, Macro Sensors Offshore LVDT linear position sensors are gaining traction in marine and offshore applications – especially for elongation measurement as part of long-term finite element analysis of pipelines, derricks, moorings and other critical high-stress members on offshore oil platforms that must be constantly monitored to ensure ongoing drilling platform stability.

Reliability is of critical importance

In addition to providing measurements, fro§m micro inches to two feet, with repeatability and precision, the linear position sensors are built to operate for at least 20 years, even if the sensor is fully exposed to seawater. Since the cost associated with replacing underwater hardware is extremely high, reliability is of critical importance in offshore applications. 

Macro Sensors offshore LVDTs are hermetically sealed, constructed with a subsea connector and gold-plated pins and rated up to 7500 psi in order to survive and perform accurately when submerged in the ocean for indefinite time periods. Dependent upon ocean temperature and depth levels, the LVDT casing is typically composed of special alloy that supports long-term operation.

As sensor housings and core carriers made from stainless steel do not survive well in shallow warm water, Macro Sensors designs its offshore LVDTs with unusual material such as Inconel, titanium and hastelloy for pressure and corrosion resistance, enhancing the reliability required of this sensor for longer term operation. LVDTs are very reliable with no moving parts and are the preferred displacement sensors when it comes to reliability and longevity.


Adapted from press release by Cecilia Rehn

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