The vibrating wire crack meter is an instrument designed for continuous and highly reliable monitoring of displacements between two points located across a crack or structural joint. It is particularly suitable for long-term applications and automated monitoring installations. The device consists of a vibrating wire displacement transducer integrated into a stainless steel telescopic body with two anchor points. Variations in distance between the anchors modify the wire tension, generating a change in vibration frequency proportional to the displacement. Unlike traditional analog signals, the frequency output signal ensures high long-term stability and allows transmission over long distances without signal degradation, making the sensor ideal for permanent installations and harsh environments. The self-aligning joints and rugged construction ensure reliable operation even in the presence of misalignments or off-axis movements, while compatibility with dataloggers and data acquisition systems allows integration into complex structural monitoring networks.