|The LVDTs are available with signal conditioners for DC-DC or 4-20 mA operation.|
Trans-Tek has launched the latest model of its high-pressure/high-temperature (HP/HT) linear displacement transducers (LVDT). The new model, based on its Series 230, has a .30-in. outside diameter (OD) body style. Previous models are still available with either 3⁄8-in. or ¾-in. OD body style. Originally developed for a tool manufacturer for the downhole drilling industry, offshore applications include R&D testing and wherever extreme environments with higher pressures and higher temperatures exist than standard LVDTs would withstand.
These transducers use a perforated housing to equalize pressure inside and outside the LVDT. Thus, fluids must be electrically non-conductive and chemically benign, since the holes in the housing expose the coils inside. Many hydraulic oils meet this requirement. High temperature ratings are achieved by using special internal materials.
All three of these LVDTs are rated for pressures to 35,000 psi and at continuous temperatures as high as 450°F (232°C). Non-linearity is ±0.25% and temperature coefficient of sensitivity is ±0.01% per °F. A high sensitivity output offers infinite resolution in a variety of strokes.
Trans-Tek was formed in 1967 to manufacture a broad line of linear and angular displacement and linear velocity transducers. The company operates and manufactures all of its transducers from a 14,000-sq ft (1,300-sq m) facility in Ellington, Connecticut.