- Product Details
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Quick Details
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Brand Name:
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KCMC
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Power supply:
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220VAC/ 24VDC/battery
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Display:
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LCD Display
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Communication:
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GSM
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Accuracy:
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1.0%
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Material:
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SS304
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Measuring medium:
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Liquid Water
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Medium:
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Gases
Quick Details
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Type:
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Variable Area Water Flowmeters, Variable Area Air & Gas Flowmeters, Variable Area Petrolum Flowmeters, Variable Area Oil Flowmeters
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Warranty:
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12 months
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Place of Origin:
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Henan, China
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Brand Name:
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KCMC
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Power supply:
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220VAC/ 24VDC/battery
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Display:
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LCD Display
-
Communication:
-
GSM
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Accuracy:
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1.0%
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Material:
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SS304
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Measuring medium:
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Liquid Water
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Medium:
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Gases
A mass flow meter, also known as an inertial flow meter, is a device that measures mass flow rate of a fluid traveling through a tube. The mass flow rate is the mass of the fluid traveling past a fixed point per unit time.
The mass flow meter does not measure the volume per unit time (e.g. cubic meters per second) passing through the device; it measures the mass per unit time (e.g. kilograms per second) flowing through the device. Volumetric flow rate is the mass flow rate divided by the fluid density . If the density is constant, then the relationship is simple. If the fluid has varying density, then the relationship is not simple. For example, the density of the fluid may change with temperature, pressure , or composition. The fluid may also be a combination of phases such as a fluid with entrained bubbles. Actual density can be determined due to dependency of sound velocity on the controlled liquid concentration.
The mass flow of a U-shaped Coriolis flow meter is given as:
where K u is the temperature dependent stiffness of the tube, K is a shape-dependent factor, d is the width, τ is the time lag, ω is the vibration frequency, and I u is the inertia of the tube. As the inertia of the tube depend on its contents, knowledge of the fluid density is needed for the calculation of an accurate mass flow rate.
If the density changes too often for manual calibration to be sufficient, the Coriolis flow meter can be adapted to measure the density as well. The natural vibration frequency of the flow tubes depends on the combined mass of the tube and the fluid contained in it. By setting the tube in motion and measuring the natural frequency, the mass of the fluid contained in the tube can be deduced. Dividing the mass on the known volume of the tube gives us the density of the fluid.
An instantaneous density measurement allows the calculation of flow in volume per time by dividing mass flow with density.
A thermal gas mass flowmeter is a type of flowmeter used to measure the mass flow rate of gases. It operates on the principle of heat transfer from a heated element to the flowing gas.
The flowmeter consists of a heated sensor element and a temperature sensor. The sensor element is heated to a constant temperature, and the gas flowing over it carries away heat. The temperature sensor measures the temperature difference between the heated element and the gas.
Based on the heat transfer principle, the flowmeter calculates the mass flow rate by measuring the power required to maintain the heated element at a constant temperature. The power required is proportional to the mass flow rate of the gas.
Application and the features of the Thermal gas mass flowmeters:
| Industry | HVAC systems, industrial processes, and scientific research. |
| Feature |
1. high accuracy, wide rangeability, and low pressure drop 2. limitations in measuring certain gases with low thermal conductivity or high viscosity. |
Overall, thermal gas mass flowmeters provide a reliable and efficient method for measuring the mass flow rate of gases in various applications.
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