Sicco engineering works offer pitot tubes used for measuring the velocity of both liquid and gas flow. The basic principle that is being used by these kind of instruments is that measure the difference between the impact pressure and static pressure.By using manometers. Its constructional feature is like: pitot tube consists of two concentric tubes, the inner tube being the impact pressure tube whose opening faces directly into the stream to measure the impact pressure. The outer tube consists of one or more rows of small holes on the circumference to measure the static pressure. Materials of construction are ss and brass. Other types of pilot tubes such as s type [illustrated], double d type and h type are also available.
Pitot Tubes - Indian Products Directory