CALIBRATION GAS MIXTURE IN 0. 5 LTR W/ C ALUMINIUM CANISTER ALONG WITH FINE CONTROL NEEDLE VALVE: METHANE = 100PPM, ETHANE = 1000PPM, ETHYLENE = 1000PPM, ACETYLENE = 1000PPM, HYDROGEN = 1000PPM, CARBON DIOXIDE = 5000PPM, CARBON MONOXIDE = 5000PPM, NITROGEN BALANCE FILLING PRESSURE- 20KG/ SQ. CM MAKE- CHEMTRON/ UPG/ SPAN CAN/ AGS Note: 1 ) The gas canister no. should be punched clearly on the cylinder and should contain pressure gauge on the canister to show internal pressure of the canister., ( 2 ) calibration certificate should be given by any govt. accredited laboratory and canister no. should be mentioned on the calibration certificate.