Macro Sensors is offering an in-depth tutorial on linear variable differential transducers or LVDT linear position sensors on its web site.
Go to http://www.macrosensors.com/lvdt_macro_sensors/lvdt_tutorial/index.html for the tutorial, which covers everything you want to know about LVDTs, including construction, significant features, operation and industrial applications. It even answers questions on where to use an LVDT and what types of electronics work best for specific applications.
A tried and true technology, LVDTs can measure movements as small as a few millionths of an inch up to several inches as well as positions up to ±20 inches (±0.5 m). Commendable features such as friction-free operation, infinite resolution and unlimited mechanical life make LVDTs the preferred technology in a wide variety of applications such as industrial automation manufacturing, power generation, civil engineering as well as industrial and subsea environments.