Non-destructive inspection device

特許 係属中 PROBLEM TO BE SOLVED: To provide a non-destructive inspection device by a potential difference method that eliminates error due to the positional displacement of a current supply terminal and a potential difference measurement terminal, and reduces the error due to the displacement of the distance between the terminals, and to provide a measurement method of the non-destructive inspection capable of increasing the reproducibility and accuracy of the measurement result using it.