supply of portable digital ultrasonic flaw .portable digital ultrasonic flaw .,portable digital ultrasonic flaw detector with a-scan storage as per rdsos specification no. m&c/ndt/125/2004, rev-ii, january 2017 with all standard accessories and required optional accessories a re as under: (1) probes and attachments: (a) normal single crystal probe having frequency: 2.5mhz, eleme nt size -10mm diameter -03 nos. (b) low angle wedge attachment having low angle with 10mm diameter: 12.5 degree., 15 degree and 17.5 degree - 01number each. make- rdso approved sources only [ warrant y period: 30 months after the date of delivery ] ]