LVDT displacement sensor

An LVDT (linear variable differential transformer) linear position sensor is a transformer that supplies a voltage proportional to the displacement of a (moving) magnetic core. This type of displacement sensor with differential transformer is made up of three windings, a primary powered by an alternating signal and two secondary windings. The core slides inside these coils and generates voltages V1 and V2 in each secondary winding, the amplitudes of which depend on the position of the mobile core. The output signal is then rectified in order to obtain a DC voltage representative of the position to be measured. Penny+Giles' AF linear displacement sensors use non-contact technology and can therefore be placed in a harsh industrial environment (extreme temperatures, vacuum, high pressures, etc.). They have a guided and ball-jointed measuring rod. Penny+Giles offers a variety of conditioning electronics.