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What are the types of flow meters? Flow meter is one of the indispensable instruments in industrial measurement. With the development of industrial production, the requirements for accuracy and range of flow measurement are becoming increasingly high, and flow measurement technology is also constantly improving. Currently, over 100 types of flow meters have been put into use. According to different classification methods, flow meters can be classified into multiple types.
1. Classification by measurement principle 1 Mechanics principles: including differential pressure, rotor, impulse, movable tube, mass, target, turbine, pitot tube, volumetric and weir, trough flow meters, etc.
2. Electrical principles: such as electric magnetic flowmeter, differential capacitive flowmeter, inductive flowmeter, strain resistance flowmeter, etc.
3. Acoustic principles: ultrasonic flowmeter, acoustic (shock wave) flowmeter, etc.
4. Thermal principles: thermal flowmeter, direct opening calorimeter, indirect calorimeter flowmeter, etc.
5. Optical principles: laser flowmeter, photoelectric flowmeter, etc.
6. Atomic physics principles 7. Other principles such as labeling principle (tracer principle, nuclear magnetic resonance principle), related principles, etc.
2. Classification according to the principle of flowmeter structure 1 Positive displacement flow meters: such as elliptical gear flow meters, waist wheel flow meters (Roots flow meters), rotary piston and scraper flow meters, etc.
2. Blade type flow meters: such as water meters, turbine flow meters, etc.
3. Differential pressure flow meters (variable pressure drop flow meters): such as throttling devices or dynamic pressure m
4. Variable area flow meters (constant pressure drop flow meters): such as rotor (float) flow meters, etc.
5. Momentum flow meters: such as target and rotary vane flow meters, etc.
6. Impulse flow meters: such as horizontal force impulse flow meters, etc.
7. Electromagnetic flowmeter: suitable for media with low conductivity, such as water, slurry, etc.
8. Ultrasonic flowmeter: can be made into a non-contact type and can be linked with an ultrasonic water level gauge for open flow measurement. 9. Fluid oscillating flowmeter: such as vortex flowmeter, vortex flowmeter, etc. 10. Mass flowmeter: There are two types: direct and indirect, such as calorimetry, angular momentum, vibration gyroscope, Magnus effect, and Coriolis force. The above are some commonly used types of flow meters. With the development of technology and the needs of practical applications, new types of flow meters will continue to emerge, and the types of flow meters will become more diverse.
2. Possible problems with the Roots meter of the turbine flow meter
Possible problems with the turbine flow meter include the display of flow rate not matching the actual flow rate, no flow rate display, and unstable output signal;
; Possible issues with Roots flow meters include no output signal after power on, abnormal noise and noise, leakage, large measurement errors, and non display on the screen. Turbine flowmeter: The displayed flow rate does not match the actual flow rate: the reason may be due to incorrect instrument coefficient settings, sensor failures, or fluid conditions in the pipeline that do not meet the requirements. The solution is to recalibr
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