News

Measurement principle of pipe mass flowmeter density meter - focus on microfluidic control technology

Pipe mass flowmeter Densitometer is a commonly used flow measuring instrument that can directly measure the mass flow rate of the medium passing through the flowmeter. It has the advantages of high measurement accuracy, good sensitivity, flexible use and high reliability. What is the measurement principle of the pipe mass flowmeter densitometer?
The pipe mass flowmeter densitometer uses a thermal measurement to measure the flow rate by the molecular mass of the separated molecules. Because it is measured by the sensible heat, it does not affect the measurement due to changes in gas temperature and pressure. the result of. Pipeline mass flowmeter density meter is a relatively accurate, fast, reliable, efficient, stable and flexible flow measurement instrument. It will be more widely used in petroleum processing, chemical industry, etc. It is believed that it will show great growth in driving flow measurement. potential. The pipe mass flow meter densitometer cannot control the flow rate. It can only detect the mass flow of liquid or gas, and output the flow value by analog voltage, current or serial communication. However, the mass flow controller is a meter that can detect both at the same time and can be controlled. In addition to the measuring part, the mass flow controller itself has an electromagnetic regulating valve or a piezoelectric valve, so that the mass flow control itself constitutes a closed loop system for controlling the mass flow of the fluid. The set value of the mass flow controller can be provided by analog voltage, analog current, or computer, plc.
The pipe mass flow meter densitometer also measures the density of the media and indirectly measures the temperature of the media. Since the transmitter is a smart meter with the single chip as the core, more than ten parameters can be derived for the user according to the above three basic quantities. A flow measuring instrument that measures mass flow in a pipe. Under the condition that the measured fluid is in a large change of parameters such as pressure and temperature, if only the volume flow rate is measured, a large measurement error will be caused by the change of the fluid density. In volumetric and differential pressure flow meters, the density of the fluid being measured may vary by 30%, which can cause 30 to 40% error in flow. As the level of automation increases, many production processes place new demands on flow measurement. The chemical reaction process is controlled by the quality of the feedstock, not the volume. The heating and cooling effects of the vapor and air streams are also proportional to the mass flow. Strict control of product quality, accurate costing, and fuel quantity control for aircraft and missiles also require precision.

PREVIOUS：What are the trade transactions for Coriolis NEXT：Introduction to the structure of Coriolis mas