An LVDT sensor (Linear Variable Differential Transformer) is an electromechanical device widely used across industrial applications. It consists of a primary coil, secondary coil assemblies, and a movable magnetic core. As the core shifts position, it converts linear displacement into a proportional electrical signal. This makes the LVDT sensor an essential tool for achieving precise, reliable measurements in a wide range of engineering and manufacturing environments.
Operating principle
When the core moves within the coil structure, the electromagnetic coupling between the primary and secondary coils changes. This variation generates a differential output voltage that corresponds directly to the core’s displacement. Because the signal is differential, common mode interference is minimised, giving the LVDT sensor high accuracy, excellent repeatability, and stable performance even in noisy industrial environments.
Industrial applications
LVDT sensors are critical wherever accurate linear measurement is required. In manufacturing, they are used to check that components meet tight dimensional tolerances, ensuring quality control. Within machinery and automation systems, they provide feedback on component position, supporting efficiency, consistency, and safety. Their role extends to sectors such as aerospace, automotive, energy, and process industries, where dependable displacement monitoring is essential.
Advantages of LVDT sensors
- High resolution — capable of detecting extremely small changes in position.
- Non-contact operation — the core does not touch the coils, reducing wear and extending service life.
- Durability — built to operate continuously in demanding industrial environments.
- Low maintenance — with no sliding contacts, upkeep requirements are minimal.
- Environmental resilience — performance remains stable under extreme temperatures, vibration, and harsh conditions.
LVDT sensors from Monitran
An LVDT sensor is an indispensable tool for accurate, long term linear displacement measurement. At Monitran, we supply a wide range of stainless steel LVDT sensors designed for tough industrial environments. Whether for manufacturing, aerospace, automotive, or other specialist applications, our LVDTs provide the precision, reliability, and robustness required to keep processes running smoothly.
If you would like to find out more about our range of LVDT sensors then please get in touch.