Tenders for Supply of Digital Ultrasonic Double Rail Tester With Minimum Two Base Lines, Colored Signals And Real A-Scan Pulse Echo With Continuous Recording Of B-Scan Storage Along With Data Setups With Standard Accessories As Per Rdso Spec. Rdso/M&C/Ndt/130/2007 B-Scan, Rev-Iii, July 2017. 70 Degree F/B Angle Probe 2Mhz, S/C 20 Mm Dia. 0 Degree Normal Probe 4 Mhz, Double Crystal Power Pack With Li-Ion Battery And Auto Cut-Off Battery Charger.