supply of set of standard calibration gasset of standard calibration gas,set of standard calibration gas canister for dga consisting of methane, et hane,ethylene, acetylene, hydrogen each 1000 ppm, co and co2 each 5000 ppm and nitrog en balance-01 no, each gases 500 ppm - 01 no, each gases 100 ppm -01 no, with septa and k nob arrangement to draw sample directly from canister using gc syringe, preparation tolerance+/- 20percent and shelf life 12 months. canister capacity 0.5 litres, filling pressure 20 kg/sq.cm with test certificate and suitable septum as spares. [ warranty per iod: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]