Item Description: calibration gas mixture in 0. 5 litre w/ c aluminium canister along with fine c ontrol needle valve containing: methan: 1000ppm, ethan: 1000ppm, acetylene 1000ppm, e thylene: 1000ppm, hydrogen: 1000ppm, carbon dioxide: 5000ppm, carbon monoxide: 5000pp m, nitrogen: balance. specification: filling pressure: 20kg/ cm2, preparation toleran ce: +/- 20 %, certificate accuracy: +/- 2 %, stabiliti: 12 months. [ warranty period: 12 months afte r the date of delivery ] ]

Kolkata, West Bengal, India