Sigma NDT Group a well known NDT organization has shown its brilliant performance and ability to establish its level of confidence in versatile NDT method not only in India but also in all over the world. The principal company Sigma NDT which was incorporated in India in September 1997, to provide NDT services for fertilizer plans and pipelines. Today Sigma NDT also manufactures certain NDT instruments like AC / DC Yoke, Battery Yoke, Prod Machine, Accessories of Phased Array shoes.