Low price electromagnetic flow meter for corrosive liquid from China manufacturer is an instrument that uses the principle of electromagnetic induction to measure the flow of conductive fluid according to the electromotive force induced by conductive fluid passing through an external magnetic field. But when the Low price electromagnetic flow meter for corrosive liquid from China manufacturer is used, there will be measurement error. What's going on? What caused it?

1. The tube of Low price electromagnetic flow meter for corrosive liquid from China manufacturer is not full of liquid. The liquid in the test tube cannot be filled due to insufficient back pressure or poor installation position of the flow sensor. When there is a small amount of gas in the tube, the measurement results will deviate from the actual value, resulting in small errors; When there are many gases, the measured value will be unstable and the output will shake. At this time, the measured value error is large and cannot be used as the correct result.

2. The measured liquid contains solid components. When this happens, the Low price electromagnetic flow meter for corrosive liquid from China manufacturer usually has the following problems: slurry noise, dirt on the motor surface, the lining is worn or covered by sediment, the flow cross-sectional area is reduced, and the conductive deposition layer or insulating deposition web rod electrode or lining. If there is conductive material in the deposition layer, the flow signal is likely to be short circuited, resulting in instrument failure.

3. Improper selection of electrode and grounding ring materials. For the Low price electromagnetic flow meter for corrosive liquid from China manufacturer with failure caused by the mismatch between the material and the measured medium, the parts in contact with the medium include electrode and grounding ring. In addition to the corrosion resistance problem, the improper matching is mainly due to the electrode surface effect. Whether the electrode can reliably detect the flow signal is very important to the performance of Low price electromagnetic flow meter for corrosive liquid from China manufacturer. The grounding ring forms an electrical connection with the medium and is connected through the grounding wire and zero potential. When the process pipe connected to the sensor is plastic or pipe with insulating coating inside, the grounding ring must be installed, otherwise the instrument will not work normally.

4. Uneven conductivity

There is often a "reciprocating injection" in the injection process. If the conductivity of the injected liquid is different from that of the main liquid, but the mixed liquid has not been mixed evenly, if the Low price electromagnetic flow meter for corrosive liquid sensor is installed downstream, the instrument output will shake due to the sharp change of conductivity. Although the liquid conductivity is greater than the threshold and changes slowly, it will not affect the normal measurement of Low price electromagnetic flow meter for corrosive liquid from China manufacturer. This phenomenon often occurs in the process of adding coagulant to raw water in water treatment engineering.

The above points are the reasons for the errors of Low price electromagnetic flow meter for corrosive liquid from China manufacturer. To sum up, we can see that they are mainly caused by improper selection, installation and use in the early stage. I hope you can avoid these problems in future operation.