Tenders for Procurement Of Digital Ultrasonic Flaw Detector With A-Scan Storage And Standard Accessories For Axle Testing As P Er Rdso Specification No. M&C/Ndt/125/2004 Rev-Ii, January 2017. Model No: Ds-333 Make: Eeci. Or Mod El No: Arya-1R, Make: Modsonic.