Rolling Sensor (Dry-Contact)

Our rolling sensor was originally designed to serve dry-couplant applications that require wide bandwidths for frequency analysis in composite materials. But it has proved itself useful in metal and automated applications as well.  This sensor’s multi-element construction, coupled with advancements in acoustic impedance matching, provides low noise and high sensitivity for your application.

PAC’s rolling sensor offers several key advantages in automated and moving process applications. First, there is no need for a couplant, since the rolling sensor’s compliant tire itself makes a good acoustic contact with the part being monitored. Second, the rolling sensor can maintain a constant distance to a moving process and therefore, a constant sensitivity. Other techniques require several sensors from one end of the structure to the other end with varying detection sensitivities with distance from the source to the sensors. The rolling sensor is not fixed to the test surface; therefore, it can be applied automatically for each new process.