| 摘要 |
A metering device for multiphase fluid, for example, crude oil, com- prises a .gamma. or X-ray densiometer incorporating windows for the metering ra- diation of boron carbide. The boron carbide windows can be provided by a sleeve guiding the fluid flow, the sleeve (51) being reinforced by a thin ex - ternal layer (52) of carbon fibre embedded in expoxy resin. Alternatively, a steel tube (26) receiving the fluid flow has aligned transverse apertures (4 7) containing plugs (49) of boron carbide.
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