supply of rdso / m&c / ndt / 140 / 2007, digital ultrasonic double rail tester ( drt ) with 9 probes on each rail and minimum two base lines coloured signals and real a-scan pulse echo with continuous recording of b-scan storage of each probe along with data setups as per rdso specification no rdso / m&c / ndt / 140 / 2007 ( b-scan ) rev-iv august 2021 with standard accessories with separate / dedicated channel for testing wheel burn / scabbed locations, sej & tongue rails of points by hand probing without affecting the regular channels and additional spares for one year consisting of normal probe ( 4 mhz, 18 / 20 mm diameter split crystal ) - 08 nos, 70 degree angle probe - 12 nos, 37 degree angle probe ( forward and backward ) - 08 nos, 45 degree angle probe with cable for hand probing - 04 nos and 70 degree angle probe with cable for hand probing - 04 nos [ warranty period: 30 months after the date of delivery ]