A manometer is a tool for analogously measuring liquid or gas pressure. Essentially, it is made of a U-shaped pipe. Depending on the pressure exerted by the fluid whose pressure is being monitored, the level of liquid in the pipe fluctuates. The pressure is determined on the preexisting scale by taking advantage of the level differential between the two arms.

Liquid Filled Manometer

Manometers and Pressure Meters

General Purpose Manometer

General Purpose Manometers