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Understanding LVDT Sensors: How They Work and Their Applications

Tuesday, June 25, 2024

What is an LVDT Sensor?

An LVDT (Linear Variable Differential Transformer) sensor is a type of electromechanical device used to measure linear displacement (position). These sensors are renowned for their high accuracy, reliability, and durability in various industrial applications.

How Does an LVDT Sensor Work?

An LVDT sensor consists of a primary coil and two secondary coils wound on a cylindrical former. A movable core, usually made of ferromagnetic material, travels through the coils. When an alternating current (AC) excitation is applied to the primary coil, it induces a voltage in the secondary coils. The difference in voltage between these secondary coils is proportional to the core's displacement, providing a precise measurement of position.

Key Features of LVDT Sensors

  1. High Accuracy: LVDT sensors offer exceptional precision, often in the micrometer range.
  2. Durability: These sensors can withstand harsh environments, making them suitable for industrial and aerospace applications.
  3. Infinite Resolution: Due to their continuous output, LVDT sensors provide infinite resolution, allowing for precise measurement changes.
  4. Friction-Free Operation: The core moves without physical contact, eliminating wear and tear and extending the sensor's lifespan.

Applications of LVDT Sensors

LVDT sensors are utilized across various industries due to their versatility and reliability. Some common applications include:

  • Aerospace: For measuring the displacement of control surfaces and landing gear.
  • Automotive: In suspension systems and throttle position sensing.
  • Industrial Automation: For monitoring and controlling processes involving linear displacement.
  • Medical Devices: In equipment requiring precise position measurements, such as imaging systems.

Why Choose Sentech Sensors for LVDT Solutions?

At Sentech, we specialize in providing top-of-the-line LVDT sensors tailored to meet your specific needs. Our sensors are designed to deliver unmatched accuracy and durability, ensuring optimal performance in even the most demanding environments.

Explore Our Range of Sensors

Discover our comprehensive range of LVDT sensors and other innovative sensing solutions on our website:

  • Sentech
  • Custom Sensor Solutions
  • Applications
  • Support


LVDT sensors are an indispensable tool in modern engineering and manufacturing, offering unparalleled precision and reliability. Whether you're in aerospace, automotive, or any other industry requiring accurate linear displacement measurement, Sentech Sensors has the perfect solution for you. Visit our LVDT Sensors page to learn more about our offerings and how we can help you achieve your measurement goals.

For more information and to explore our full range of products, visit Sentech Inc (www.sentechsensors.com).

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