Insertion type electromagnetic flowmeter and pipe section electromagnetic flowmeter difference

Case introduction

Whether they are insertion type or pipe segment type, the principle is actually the same, but the difference is the structure and installation method.

1. The installation, use and connection methods are different: the pipe-type electromagnetic flowmeter has two flanges on the left and right sides of the meter body connected to the user's pipeline. The plug-in electromagnetic flowmeter requires the user to open a hole at the top of the pipe and connect the plug-in electromagnetic flowmeter. The flange base of the flowmeter is welded to the bottom hole, and then the insertion electromagnetic flowmeter is installed in the pipeline.

2. Measurement accuracy: The measurement accuracy of the pipe-type electromagnetic flowmeter is 0.5, while the measurement accuracy of the insertion electromagnetic flowmeter is 2.5.

3. Suitable for different pipe diameters: the segment type is suitable for pipe diameters DN6-DN1200D, etc., while the plug-in type is only used for measuring pipe diameters greater than 250.

4. In terms of installation, use and maintenance: Pipe-type electromagnetic flowmeters have shortcomings such as difficulty in installation and use on large-diameter pipelines, high price, and difficulty in periodic calibration. The insertion electromagnetic flowmeter measures the average flow rate of the fluid in the pipeline to obtain the fluid volume flow rate. It can be installed and used without affecting the normal production of the system. Pressure drilling and installation are suitable for pipes such as steel pipes and cast iron pipes. The insertion electromagnetic flowmeter is simple to install, has continuous flow, and has on-site pressure opening. The flow detection is only related to the insertion depth. The flowmeter has wide versatility and strong interchangeability. One model can meet the fluid measurement requirements of various specifications of pipelines. The insertion electromagnetic flowmeter is easy to install, can stop flow, and can open holes under pressure on site. The detection of flow rate is only related to the insertion depth, so the flowmeter has wide versatility and strong interchangeability. One model can suit the fluid measurement requirements of various specifications of pipelines.

5. Cost: For large-diameter pipelines, the cost of insertion electromagnetic flowmeters is lower.

Whether it is a plug-in electromagnetic flowmeter or a pipe-type electromagnetic flowmeter, the following aspects should be paid attention to during installation:

1. Avoid strong magnetic fields

2. Avoid strong electromagnetic waves. Since the electromagnetic flowmeter should meet the requirements of electromagnetic compatibility, it can operate normally in the specified radiated electromagnetic field environment and will not affect the normal operation of the instrument. When the interference of on-site separation electromagnetic flowmeter is large, radio waves may become the source of interference.

3. After the pipeline stray current and the electromagnetic flowmeter are grounded, the influence of most stray currents in the pipeline can be avoided.

4. Changes in the ground electrical position. If a voltage drop occurs on the ground wire of other equipment, the ground electrical position of the electromagnetic flowmeter will change, causing greater interference and affecting the measurement.

5. In humid environment, electromagnetic flowmeters are used in the drainage industry. The flow sensors are often used in instrument wells below the horizon, so they are often immersed in rainwater that is not discharged in time. Pay attention to the contact terminal box and sealing ring to be compressed tightly and waterproof.