As the Pressure of the gas being measured increases the height of the fluid in the Manometer Tube increases. The reverse is also true. The graduations of the Manometer Tube gives you a reading of the Gas Pressure being measured.

A manometer is an instrument that can be used to measure the pressure in an enclosed container that is filled with gas. The manometer is sometimes called a pressure gauge.

I don't know the specific answer but it won't be a manometer. That measures small gas pressures.

You can use a manometer.

simple manometer differential manometer inclined manometer