In the industrial pipeline on the laws of fluid flow, flow measurement instrument selection and calculation, to encounter a series of fluid characteristics and flow reflects the state of physical parameters. These parameters are commonly used by the fluid density, viscosity, thermal insulation index ( Such as entropy index), the volume compression factor, and Reynolds number, the velocity ratio (Mach), these physical parameters and temperature. Closely related to the pressure. Flow measurement of the first and second components of the design of the instrument calibration, are in a certain pressure and temperature conditions carried out. If the actual conditions over the scope of design requirements, that is to make consequential amendments.

1, the density of fluid

Fluid density (P) is a fluid one of the important parameters, it said unit volume of fluid quality. In general industrial production, fluid can generally be regarded as uniform fluid, the fluid density of its quality and volume are obtained:

P M/V 12

In the formula mFluid quality,kg

VM for the quality of the fluid volume,m 3

The density of units conversion table 1-3.