are also more limited in operating temperature than other
types of flowmeters and may have difficulty measuring low-density fluids (gases) and mixed-phase68
(liquid/vapor) flows. The bent tubes used to sense process flow may also trap process fluid inside
to the point where it becomes unacceptable for hygienic (e.g. food processing, pharmaceuticals)
applications. Straight-tube Coriolis flowmeter designs, and designs where the angle of the tubes is
slight, fare better in this regard than the traditional U-tube Coriolis flowmeter design. However,
an advantage of U-shaped tubes is that they aren’t as stiff as straight tubes, and so straight-tube
Coriolis flowmeters tend to be less sensitive to low flow rates than their U-tube counterparts.