NewTek Sensor Solutions

LVDTs are selected when reliable, robust, and accurate position sensing is critical. Learn Why…

A Linear Variable Differential Transformer (LVDT) is common type of position sensor that converts the linear position or motion of a measured object to a proportional electrical output that can be read by operators and control systems. LVDTs are most frequently used where measuring ranges vary from ±0.010 inches (±0.254 mm) to ±10 inches (±254 mm). LVDTs can be designed for temperatures from cryogenic ranges -238°F (-150°C) to as high as 1000°F (537°C).  The LVDT features frictionless operation, is very rugged in harsh environments, possesses excellent accuracy and repeatability, and has a near-infinite expected service life.

The animation above shows the raw output of the LVDT as the measured object moves the LVDTs core.  In most applications, the LVDT housing is mounted to a fixed position, while the measured object is mechanically linked to the movable LVDT core.  As the core moves, the LVDT’s output changes as shown in the animation.   We will discuss how this works in more detail.