| 摘要 |
A flowmeter of the rotometer type, wherein a variable-area tube formed of glass and containing a float, is supported between inlet and outlet end fittings having ports to receive inlet and outlet pipes. The tube and the end fittings, save for the ports, are encapsulated in a transparent plastic jacket adapted to pre-stress the tube to enhance the pressure characteristics of the meter. The cross-sectional shape of the jacket is such as to provide a magnifying lens with respect to a calibrated scale extending along the tube, the jacket also serving as a protective shield in the event the tube is shattered. |
