Open Tender for DGA Calibration Gas mixture (Standard gas) in 500ml cylinder aluminium can contain 10 liters of available gas with following compositions. 1) 1000 PPM -Methane, 2)1000 PPM-Ethane, 3) 1000 PPM -Ethylene, 4) 1000 PPM Acetylene, 5) 1000 PPM-Hydrogen, 6) 5000 PPM- Carbon dioxide, 7) 5000 PPM -Carbon monoxide,8) Balance - Nitrogen . Note: 1) Firm shall supply in cans of each capacity 500 ml with septum type needle valve for drawing the gas. 2) Gas composition and gas quantity certificate must be provided along with the supply of material. in Andhra Pradesh