Northeast Frontier Railway

Northeast Frontier Railway has published Supply Of dga calibration gas mixture , dga calibration gas mixture,calibration standard gas mixture in 0.5 liter water capacity, alu minium canister consiting of 10 liters at 20 b a r pressure having following composition: 1) methane =100 0 ppm , 2) ethane = 1000 ppm, 3)acetylene = 1000 ppm, 4)ethylene=1000 ppm, 5) hydrogen = 1000 ppm , 6) co =5000 ppm,7) co2= 5000 ppm & balance nitrogen along with calibration certificate make: spantech ,spancan,sigma, hamilton ,nucon & similar [ warranty period: 30 months after the date of delivery ] ]. Last date of submission for this tender is 2026-09-28. This is a Railway Ancillaries tender in Malda, West Bengal