『Types of gas flow meters』Related information(flow rotameter|digital flow meter|balo meter|hydraulic flow meter|volumetric meter|positive displacement meter|pitot tube flow meter|displacement meter|cfm meter|variable area flow meter|inline flow meter|differential pressure flow meter|calibrated flow meter|velocity meter|paddle wheel flow meter|oval gear flow meter|anemometer hvac|multiphase flow meter|doppler flow meter|thorpe tube flowmeter|heat flow meter)
1. Which is a good air pressure sensor?
2. What are the commonly used models of low-pressure and high flow air flow meters?
Common low-pressure and high flow air flow meters mainly include thermal gas mass flow meters, Annubar/Velbar flow meters, LWQ series compressed air flow meters, and general-purpose vortex flow meters.
1. Thermal gas mass flowmeter 1 Adaptation scenario: Suitable for low-pressure air metering with low flow rate, wide range, and large diameter, it can directly measure mass flow rate without additional temperature and pressure compensation, and has high sensitivity to low flow rate gases. Performance parameters: accuracy of ± 1.0% to ± 1.5% FS, diameter coverage of DN15 to DN2000, and plug-in models can be adapted to ultra large diameter pipelines for infiltration.
2. Anuba/Veliba flowmeter 1 Installation features: Plug in installation does not require pipe breakage, with minimal pressure loss, suitable for measuring large-diameter air ducts, such as factory ventilation and large fan supply scenarios. Advantages and limitations: The pointer type can be read directly on site, with a simple structure and resistance to temperature and visible car spine pressure, suitable for low budget routine monitoring. However, under conditions containing impurities, it is easy to cause blockage of throttling components and needs to be cleaned regularly.
III. LWQ Series Compressed Air Flow Meter 1. Standard Basis: Developed in accordance with GB/T32021-2015 standard, integrated with temperature, pressure, flow sensors and intelligent flow integrator
2. Performance Features: Excellent low-pressure and high-pressure metering performance, flow range ratio of 20:1, good repeat
3. Model Example: LWQ-25, nominal diameter DN25, starting flow rate ≤ 0.8m ³/h, flow range 2.5-25m ³/h.
.4. Universal Vortex Flow Meter 1 Adaptation scenario: Suitable for low-pressure air metering scenarios with medium to high flow rates, stable flow rates, and relatively stable pipeline pressures. Performance features: no moving parts, low pressure loss, long service life, with temperature and pressure compensation, accuracy of ± 1.0% R, caliber range of DN15 to DN300. Model example: such as Duoqin DVS-DG15F11U, medium is air, DN15 caliber, body material is 304 stainless steel, working pressure is 1.6MPa, can display instantaneous and cumulative flow on site, supports 4-20mA output, 24V power supply, and ensures flow measurement range of 2.8-12m ³/h for sail accuracy.
3. Common types of gas mass flow controllers
1. Positive displacement flowmeter, also known as quantitative flowmeter, divides the fluid into known volume parts through mechanical measuring elements, and determines the volume flow rate of the fluid based on the number of times these parts are filled and discharged by the measuring chamber.
2. Float flowmeter, also known as rotor flowmeter, belongs to a type of variable area flowmeter.
. In a gradually expanding vertical cone tube, the float is supported by the power of the liquid, allowing it to freely rise and fall in the cone tube. The circular cross-section float measures the flow rate based on this. 3. Differential pressure flowmeter calculates the flow rate based on the differential pressure generated by the fluid passing through the detection element, combined with the fluid condition
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