Final answer:
A continuous metering device is used to measure flue gas emissions
Step-by-step explanation:
The fuel metering unit is disposed in a fuel flow between a prefeed pump and a high-pressure fuel pump of a fuel injection system for an internal combustion engine and serves to variably adjust the fuel quantity delivered by the high-pressure fuel pump. What is fuel metering valve? Fuel metering valves are the gas turbine’s throttle control.
The device used for measuring flue gas emissions is called a continuous metering device. This device is commonly used to measure the quantity and composition of flue gases emitted from industrial processes or combustion systems. It continuously monitors the concentration of various gases, such as carbon dioxide, carbon monoxide, and nitrogen oxides, in the flue gas stream.