Electromagnetic Flowmeter Installation Recommendations(Part 1)

1. Ensure that the full pipe is installed

The measuring tube of the electromagnetic flowmeter must be full, and there must be no part full. If the pipeline is not full or the outlet is vented, the sensor should be installed on a siphon.

Avoid installation upstream of the downward pipeline

Avoid the highest point of the pipeline, which tends to accumulate bubbles

2. Horizontal and vertical installation

The sensor can be installed horizontally and vertically, but it should be ensured to avoid the influence of deposits and bubbles on the measuring electrode, and the electrode axis should be kept horizontal. When installing on a horizontal pipeline, the two measuring electrodes should not be directly above and directly below the pipeline. When installed vertically, the fluid should flow from bottom to top.

The inlet straight pipe should be larger than 5D, and the outlet straight pipe should be larger than 2D. Those with specific installation requirements should be installed according to the electromagnetic flowmeter manual. The plug-in inlet straight pipe section should be ≥ 20 D, and the outlet straight pipe section ≥ 7D (D is the nominal diameter of the sensor).

3. Installation when the outlet is empty

When the outlet is in the empty state, the sensor should not be installed in the empty place of the pipeline, but should be installed in a lower place. When the sensor is installed below the pipe, it should be ensured that the sensor is filled with liquid and there is no empty pipe state.

4. Series installation and parallel installation

If several sensors need to be connected in series on the same pipe in sequence, the distance between each sensor should be at least the length of 2 sensors.

If two or more sensors are installed parallel to each other, the distance between the sensors must be greater than 1m.

5. Installation between elbows, valves and pumps

To ensure the stability of the measurement, straight pipe sections should be set before and after the sensor, the length of which is given in the figure below. If this is not possible, a current regulator should be used or the cross-sectional area of the measuring point should be reduced.

The above information is provided by flow instrument manufacturer.