supply of set of standard calibration gas canister for dgaset of standard calibration gas canister for dga,set of standard calibration gas canister for dga consisting of (1) methane, ethane, ethylene, acetylene, hydrogen, co & co2 each 100 ppm and nitrogen balance, qty- 01 no. (2) methane, ethane, eth ylene, acetylene, hydrogen, co & co2 each 500 ppm and nitrogen balance, qty- 01 no. (3) methane, etha ne, ethylene, acetylene, hydrogen each 1000 ppm, co & co2 each 5000 ppm and nitrogen balance qty- 0 1 no. with pressure gauge, septum and knob arrangement to draw sample directly from canister using gc syringe. preparation tolerance plus (or) minus20 percentage & shelf life 12 months. canister capacity 0.5 li tres, filling pressure 20 kg/sq.cm with test certificate and suitable septum as spares. [ warranty period: 30 months after the date of delivery ] ] => limited