Question

What tool is used to measure gas pressure?

Answer 1

Manometer:

1. A manometer is a device that measures the pressure of a gas or vapor, some are made up of a U-shaped tube with a circulating column of liquid.
2. Mercury manometers are capable of measuring pressures ranging from $1\mathrm{mbar}$ to $1.5\mathrm{bar}$. Mercury is commonly utilized because of its high density. Mercury pressure measurement may be accomplished using a relatively simple instrument.
3. This U-tube has one end open to the environment and the other exposed to the gas.