Liquid mass flowmeter | What flowmeter is good for slow liquid flow rate

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Can mass flow meters be installed vertically? Mass flow meters can be installed vertically, but the specific installation method needs to be adjusted according to the different measuring media. When measuring liquids, the sensor housing should be installed facing downwards to effectively avoid air accumulation in the flow tube and ensure measurement accuracy. When measuring liquid slurry: the sensor should be installed vertically, and the process medium should flow from bottom to top: this installation method is similar to the hanging of a flag with a ribbon, which can effectively prevent particles from accumulating in the flow tube, while ensuring smooth flow of the medium and avoiding the occurrence of jet air collision with the pipe. In summary, when installing a quality flowmeter vertically, it is necessary to choose the appropriate installation method according to the different measuring media to ensure the accuracy of the measurement and the normal operation of the equipment.

2. Reading of liquid flowmeter

The reading method of liquid flowmeter mainly depends on its type, and the core is to distinguish between instantaneous flow and cumulative flow, and correctly set the medium parameters.

. 1. General reading steps: Regardless of the type of flowmeter, it is necessary to confirm before reading: - Display unit: Confirm whether the screen displays cubic meters (m ³), liters (L), gallons (Gal), or mass units (kg/t). -Instantaneous flow and cumulative flow: There are usually "Flow Rate" or "Instantaneous Flow" and "Total" or "Cumulative Total" markings on the screen. -Medium parameter setting: For flow meters such as vortex street and electromagnetic flow meters, it is necessary to correctly set Liquid mass flowmeter

the density, viscosity, and other parameters of the measured liquid in the instrument, otherwise the reading will be seriously inaccurate. |Check the mechanical counter or electronic display screen. Pay attention to the influence of viscosity, high viscosity liquids can lead to low readings. ||Electromagnetic | Based on Faradays law of electromagnetic induction, measure the induced electromotive force generated by the cutting of magnetic field lines by conductive fluids. |The reading is not affected by temperature, pressure, or viscosity. Liquid conductivity must be required (such as water, acid, alkaline solution), and pure water and oil cannot be measured. ||Ultrasonic method | calculates flow velocity by detecting the time difference between the propagation of ultrasonic waves in both forward and backward directions. |Divided into external clamp type and pipe section type. The external clip installation is convenient, but the accuracy is relatively low. When reading the age of the eggplant, it is necessary to ensure good coupling of the probe. ||Mass flow meter (Coriolis) | directly measures the Coriolis force generated when a fluid flows through a vibrating tube, which is proportional to the mass flow rate. |Directly measuring mass flow rate yields the most accurate readings and is not affected by changes in the physical properties of the medium (density, temperature, pressure). The cost is relatively high. |3. Common problems and solutions - inaccurate readings or large jumping: Check whether the straight pipe sections before and after the flowmeter meet the requirements (usually the first 10D and then 5D, where D is the pipe diameter), and eliminate fluid disturbances caused by pumps, valves, etc. -Flow rate but n

Liquid mass flowmeter | What flowmeter is good for slow liquid flow rate

2. Reading of liquid flowmeter

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