supply of calibration gas mixture in 0.5 litre water capacity aluminium canister along with fine control needle valve and regulator with gauge.calibration gas mixture in 0.5 litre water capacity aluminium canister along with fine control needle valve and regulator with gauge., calibration gas mixture in 0.5 litre water capacity aluminium canister along with fine control needle valve and regulator with gauge. the composition of calibration gas is methane - 1000 ppm, ethane - 1000 ppm, ethylene - 1000 ppm, acetylene - 1000 ppm, hydrogen - 1000 ppm along with carbon dioxide and carbon monoxide - 5000 ppm each and nitrogen balance filling pressure : 20 kg / cm2 of spantech or equivalent. note - material to be supplied in phase wise manner i.e. 01 no. qty in every 4 months after placement of po. ( material to be procured from oem or its authorized dealer and may please submit proof of purchase. ) [ warranty period: 30 months after the date of delivery ]