Abstract:
The main objective of this paper is to present a study on non-destructive testing (NDT) technique. The technique testing is Eddy Current Technique (ECT) where copper (Cu) and
Magnesium Alloy (Mg Alloy) metals in 100mm X 100mm X 1.5mm dimension were chosen as the metal testing. Identical artificial defect then constructed on the metal testing and
were tested to find its optimal frequency. The input frequencies were ranged between 10-120 kHz and a dual sensors were designed and established to gather the output. The
output signals of the voltage of testing from the sensor circuit then compared to analyse the optimal of range frequency for the testing instrument. The result of this research
showed that the nondestructive metal testing instrument of dual sensor by using eddy current method can be used to find different defect for copper (Cu) and Magnesium Alloy
(Mg Alloy). The optimal frequencies for copper and magnesium alloy metal is 60 kHz.
