KC-120B coating thickness gauge adapts principles of electromagnetic induction and magnetic induced edd current. It can measure the thickness of non-metal coatings on metal surface. Press the button to select magnetic metal or non-magnetic metal. It is a ideal instrument in manufacture, metal machining industry, chemical industry and commodity inspection, especially in automobile trading. KC-120B has been designed as a user friendly and economical way, with the function of LCD displaying and measurement data hold automatically. It has the advantages of easy operation, rapid measurement, safe usage and portability.