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In recent years, there have been rapid developments in technology which have emerge geophysical methods as one of the research alternatives. Some research requires non-destructive test to determine characteristics of an object. The field of nondestructive testing involves the identification and characterization of damages on the surface and interior of materials without cutting apart or otherwise altering the material [1]. Numerous technique are used in non-destructive testing, including ultrasound tomography method. Ultrasound tomography is described as the process of reconstructing cross-sectional image of the internal structure of an object by analyzing the propagation of ultrasound wave through it [2]. Some applications of ultrasound tomography are to study shale gas ̧ shear wave anisotropy and pore pressure. The method utilizes core specimens at laboratory scale from previous drilling. In practice, the core measurement using ultrasound tomography is still using the conventional method which is manually drag the position of transducer and receiver sensors. This manual measurement is impractical and requires a lot of time. It also give different results from one researcher to another, due to the lack of uniformity and high subjectivity of the researcher during conventional measurement. Therefore, a tool that can help to optimize the performance of ultrasound tomography measurements is needed. Armed with technology, a combination of simple robotic application and a supporting tool can be a solution to get better data quality and takes less time. Robotic instrument with magnetic sensor can be arranged in accordance with our needs, in order to get fast, precise and uniform ultrasound tomography data. Introduction

Core laboratory measurements of ultrasonic tomography using the robot RTDs-U100 magnetic