| 摘要 |
PURPOSE:To achieve the measurement of gas concentration in a handy, safe and accurate manner by mixing a dry gas other than a specified gas at a certain rate to maintain the water in a gas to be measured within the applicable range of a gas analyzer when the concentration of the specified gas is measured in the gas to be measured containing water. CONSTITUTION:For example, in the measurement of H2O2 and the like in a gas of a high temperature and high humidity for example in a gas within a vessel housed in a nuclear reactor, a dry gas such as N2 is mixed with a sample gas sent via a needle valve 14 and a flowmeter 15 through a pipe 17 passing through a pressure regulation valve 16 and the mixture is sent to an oxygen analyzer 10 and a hydrogen analyzer 11 through a flow control valve 7 and a flowmeter 8 to measure concentrations of the gases. An excessive gas above the required level for analysis flows to the flow control valve 13. Thus, in stead of the use of a dehumidifier of the sample gas, a certain amount of the dry gas is added within the applicable range of the analyzers 10 and 11 whereby the measurement can be made possible accurately with a simple equipment without danger of making H2 and O2 an explosive gas respectively. |
