Tender For annual maintenance contract for " modsonic" make ultrasonic flaw detector , model : digital ultrasonic double rail tester, model: railscan-210 b-scan-drt (01 nos. for 2025-26 & 2026-27 and 05 nos. for 01 quarter of 2026-27) and ultrasonic single rail tester model: b-scan srt (02 nos. for 2025-26 & 2026-27 and 03 nos. for 01 quarter of 2026-27) and digital weld tester (10 nos.) for the year 2025-26 & 2026-27 on single tender basis from m/s nvj electronics & services, 103/ 20, foreshore road, howrah - 711102.