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LVDTs from RDP Electronics are frequently used as an active component in soil-testing equipment developed to test core samples for civil engineering and building projects.

Determining how soil samples perform under load provides critical data for engineers concerned with calculating building loads for foundations of structures such as dams, bridges, railways and buildings.

Cylindrical soil samples are subjected to pressure with LVDTs being used to measure strain in helping predict how the ground itself may deform.

Various versions of LVDTs have been developed specifically for this application, such as a right-angled cable output option to reduce the length of the device and using an unguided armature to minimise disturbance and ensure minimal stress on the mounting legs of the sample.

An additional cable option includes flexible cables to allow tight turns in the pressure vessel To flush contamination from clay and soil, through-bore waterproof transducers are typically used.

RDP Electronics – experts in measurement solutions

Measurement experts RDP Electronics Ltd have 45 years experience in developing transducers for a diverse range of applications in research, prototype testing, industrial plant and machinery, or embodied in products. Examples are numerous, spanning industries that include aerospace, automotive, structural engineering and power generation. The company is responsible for the development and manufacture of a comprehensive programmme of transducer products and associated electronics to recognised international standards for accurate and reliable measurement of displacement, load, pressure and torque. Often the best solutions have a simple elegance that is possible thanks in part to the quality and high reliability of the transducers they supply. Because of their knowledge and expertise RDP’s skilled engineering team is frequently invited to propose solutions to measurement challenges.

RDP Design, manufacture and market a wide range of LVDT and other displacement transducers. LVDT Displacement transducers accurately measure position and displacement. The strength of the LVDT is in its principle of operation. As LVDT sensors are inductive, there is no electrical connection across the sensing element ensuring clean data and a long life.

The LVDT operation principle lends itself to use in extreme environments. LVDTs can be made to work submerged in sea water, in temperatures of 600°C (1100°F) in high nuclear ratiation and at pressures of up to 2000bar (30,000psi).

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