What is a LVDT (Linear Variable Differential Transformer)?

An LVDT is an electromechanical device used to convert mechanical motion or vibrations, specifically rectilinear motion, into a variable electrical current, voltage or electric signals, and the reverse. Actuating mechanisms used primarily for automatic control systems or as mechanical motion sensors in measurement technologies. The classification of electromechanical transducers includes conversion principles or types of output signals.

In short, a linear transducer provides voltage output quantity, related to the parameters being measured, for example, force, for simple signal conditioning. LVDT Sensor devices are sensitive to electromagnetic interference. The reduction of electrical resistance can be improved with shorter connection cables to eliminate significant errors. A linear displacement transducer requires three to four connection wires for power supply and output signal delivery.

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