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When measuring sewage, slurry, and other media, the inner wall of the pipe and the surface of the electrode are prone to fouling and adhesions. When the conductivity of the fouling substance is different from that of the measured medium, measurement errors will be brought about. The adhesion of sludge and oil to the electrode […]

The basic method to achieve reliable and stable grounding of the grounding ring is to select corrosion-resistant materials that are the same as or similar to the electrode material as the material of the grounding ring, and they directly form a similar or roughly equal polarization potential with the liquid. In this way, the common-mode

One of the basic conditions for the operation of an electromagnetic flowmeter is that the normal current in the inner wall of the measuring tube is zero except for the electrode. To meet this condition, the simplest method is to line the inner wall and flange the end face of the conductive metal measuring tube

1. For flow sensors without bypass pipelines, first open the upstream valve of the flowmeter sensor with a medium opening, and then slowly open the downstream valve. Run for a period of time at a small flow rate (such as 10 minutes), and then fully open the upstream valve, and then open the downstream valve

1. Suitable fluid for measurement. The sensor is most suitable for measuring clean (or basically clean) low-viscosity single-phase fluid (gas or liquid), such as water, light oil, petroleum solvent, acid, alkali, liquid oxygen, liquid nitrogen, liquid hydrogen and air, oxygen, etc. If measuring high-viscosity liquids, the accuracy of the measurement will be reduced due to

Electrode electrode-signal out The electrode is the part where the electromagnetic flowmeter picks up the flow signal. In the measurement process, only it is in contact with the grounding ring (or called the wetted ring), the grounding electrode, and the measured medium. Therefore, in order to adapt to different medium measurement conditions, such as the

Introduction For many years, differential pressure meters were the only devices available for measuring volumetric flow rate in a pipe with reasonable accuracy at a reasonable cost. Nowadays there are many alternatives, but even so, the differential pressure meter family still holds the largest slice of the market. Advantages The popularity of differential pressure meters

The venturi tube, often known as the venturi meter, is the original form of differential pressure meter. (Strictly speaking, the “venturi tube” is the primary device and the name “venturi meter” refers to the combination of primary and secondary-but many users do not speak strictly!) A typical design is shown in Figure 3.2. Because energy

An orifice plate is simply a plate with a hole in it, forming a partial obstruction to the flow. As will be seen from Figure 3.6, the flowing fluid follows the same kind of path as it does in the venturi tube. However, the narrowest part of the flow stream is not in the orifice