LVDT position sensors can handle up to 200 °C
Customizable, high-temperature, AC-operated, linear variable differential transformer (LVDT), position sensors are available in various strokes, sizes and materials, and are engineered to operate reliably in hostile environments, where temperature can reach up to 200 °C. Units also can be developed to operate in even more extreme environments, reaching temperatures up to 1,000 °C.
Unlike magnetostrictive position sensors and other electronic sensors, which depend on integrated electronics that can degrade or fail under prolonged heat, AC-LVDTs contain no internal microelectronics at the sensing element. This design reduces thermal drift, eliminates the need for extensive shielding and cooling, provides superior survivability under sustained high temperatures, and allows simplified mechanical installation.
They’re aided by NTC LVDT signal conditioners that power and process signals from AC-LVDTs operating directly in hot zones. These external signal conditioners demodulate low-amplitude AC outputs, and converts them into DC voltage, current or digital outputs for meters, PLCs and other control systems. By keeping sensitive electronics away from heat, this position sensing system ensures long-term reliability and performance.
Because no two applications are the same, AC-LVDTs are available in tailored configurations with custom mounting configurations, compact housings, multiple stroke lengths and sizes, and high-temperature-resistant materials and construction. Each unit is engineered to meet each project’s exact environment, mechanical and performance requirements.