This standard specifies the gas source pressure range and quality requirements for industrial automation instruments. This standard applies to the gas sources used in industrial automation instruments.
GB/T 4830-2015 history
2015GB/T 4830-2015 Industrial process measurement and control instruments.Pressure range and quality of air supply
1984GB/T 4830-1984 Pressure range and quality of air supply for the industrial process measurement and control instruments