LVDT Transducers (Linear Variable Differential Transformer)
An LVDT (Linear Variable Differential Transformer) is a contactless displacement sensor consisting of a primary coil, two secondary coils, and a movable core. When AC current excites the primary coil, the core’s displacement changes the induced voltage in the secondary coil. Displacement is detected by measuring the voltage difference (with an accuracy of up to ±0.1% FS).
1. What are the Technical Advantages of LVDT Transducers?
High Reliability: No mechanical contacts, lifespan up to hundreds of millions of cycles.
Environmental Adaptability: Operating temperature range -65°C to 260°C, vibration and shock resistant.
Wide Turndown: A single sensor can measure a wide range from 0.1mm to 500mm.
2. What are the Typical Applications of LVDT Transducers?
Aerospace: Aircraft control surface position feedback, rocket fuel valve control.
Industrial Automation: Injection molding machine clamp force monitoring, CNC machine tool positioning.
Energy: Turbine blade angle measurement, nuclear reactor control rod displacement.
3. Key Selection Parameters of LVDT Transducers
Linearity: Better than ±0.25% FS
Repeatability: 0.002mm (typical)
Output Signal: Analog voltage/Digital SSI protocol