Foxboro flowmeter | Which electromagnetic flowmeter has good quality

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What are the types of flow meters?

Classified by the structural principle of flow meters and based on the actual situation of current flow meter products, they can be roughly classified into the following types according to the structural principle of flow meters: 1. Positive displacement flow meters are equivalent to a container with a standard volume number, which continuously measures the flowing medium.. The larger the traffic, the more times it is measured, and the higher the output frequency. The principle of volumetric flowmeter is relatively simple and suitable for measuring fluids with high viscosity and low Reynolds number. According to the different shapes of the rotating body, the products currently produced are: elliptical gear flowmeter suitable for measuring liquid flow rate, waist wheel flowmeter (Roots flowmeter), rotary piston and scraper flowmeter; Servo volumetric flow meters, diaphragm flow meters, and rotary flow meters suitable for measuring gas flow. 2. The working principle of impeller flow meters is to place the impeller in the measured fluid, rotate it under the impact of fluid flow, and reflect the flow rate by the speed of impeller rotation. Typical impeller flow meters are water meters and turbine flow meters, which can be of mechanical transmission output or electric pulse output structure. The accuracy of water meters with general mechanical transmission output is relatively low, with an error of about ± 2%, but the structure is simple and the cost is low. It has been mass-produced in China and standardized, universal, and serialized. The accuracy of the turbine flowmeter output by the electric pulse signal is relatively high, with a general error of ± 0.2% to 0.5%. 3. Dif

ferential pressure flowmeter (pressure drop flowmeter) The differential pressure flowmeter consists of a primary device and a secondary device. The primary device is called a flow measuring element, which is installed in the pipeline of the measured fluid, generating a pressure difference proportional to the flow rate (velocity) for the secondary device to display the flow rate. The secondary device is called a display instrument. It receives the differential pressure signal generated by the measuring element and converts it into the corresponding flow rate for display. The primary device of a differential pressure flowmeter is often a throttling device or a dynamic pressure measuring device (pitot tube, averaging tube, etc.). The secondary old Biyou device is equipped with various mechanical, electric servo pin, and combination differential pressure gauges with flow display instruments. The differential pressure sensitive elements of the differential pressure gauge are mostly elastic elements. Due to the square root relationship between differential pressure and flow rate, flow display instruments are equipped with square root devices to linearize the flow scale. Most instruments are also equipped with flow accumulation devices to display accumulated flow for economic accounting. This method of measuring flow using differential pressure has a long history and is relatively mature. It is generally used in important situations around the world, accounting for about 70% of various flow measurement methods. This type of meter is used for measuring the flow of main steam, feedwater, condensate, etc. in power plants.

2. Which electromagnetic flowmeter has good quality?

KNKE, a well-known American imported elect

Foxboro flowmeter | Which electromagnetic flowmeter has good quality

What are the types of flow meters?

2. Which electromagnetic flowmeter has good quality?

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