Armored sight flow indicators are used to observe the flow of liquids in a piping system. A rigid steel housing surrounds the sight tube and provides additional strength and protection from mechanical impact. Threaded and flanged connections are available in a variety of sizes to match the diameter of the pipe being used. Wide ranges of housing materials are also available. Units can be made with any overall length if additional visibility is required. Wetted materials consist of glass and the connection end plates. Armored sight flow indicator is recommended for low-pressure vertical or horizontal applications. Maximum pressure allowable will vary with temperature and size.