Proline Promag 50H, 53H
18 Endress+Hauser
Inlet and outlet run If possible, install the sensor well clear of assemblies such as valves, T-pieces, elbows etc.
Note the following inlet and outlet runs to comply with measuring accuracy specifications:
• Inlet run: 5 × DN
•Outlet run: 2 × DN
A0011905
Inlet and outlet run
Adapters Suitable adapters to DIN EN 545 (double-flange reducers) can be used to install the sensor in larger-
diameter pipes. The resultant increase in the rate of flow improves measuring accuracy with very slow-
moving fluids. The nomogram shown here can be used to calculate the pressure loss caused by cross-
section reduction.
!
Note!
• The nomogram only applies to liquids of viscosity similar to that of water.
• For high viscosities of the fluid the selection of a pipe with larger diameter may be considered to
reduce the pressure loss.
1. Calculate the ratio of the diameters d/D.
2. From the nomogram read off the pressure loss as a function of flow velocity (downstream from
the reduction) and the d/D ratio.
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