Beijing to explain in detail: the classification of the liquid flow sensor principle of work is what?

Liquid flow sensor can be divided into corrosive liquid flow sensor and non corrosive liquid flow sensor, the only difference in the medium, and the liquid flow sensor applications should pay attention to the problem in the first place. After the determine the nature of the liquid, can be divided according to the needs of our own. Measuring the liquid flow sensor or analog signal output flow sensor, measurement types generally have a pulse signal (now Water flow sensor is Seschenger) , analog signal output is now a switch signal output ( Such as reed water flow switch) , also can be converted into electric current and voltage signal, analog signal output is now more switch signal output ( Such as reed water flow switch) , also can be converted into electric current and voltage signal, analog can only provide a simulation ( Switch) Amount to measure. Relatively, no type liquid flow sensor with high precision, analog starting flow is also a switch quantity liquid flow sensor issue to consider. According to the accuracy, a water meter level ( Divided into class B and class A, general error between 2% ~ 3%, is A measurement certificate) , more than 5% of the more than 10% or less of electronic equipment is now commonly used as a switch signal, water or hot water heating applications, such as electric water heater, water machine, coffee machine, water heater burning gas flow sensor, Plug seal water flow sensor) 。 In a word, you can choose what you want the liquid flow sensor, from a medium, another from the demand for water, third from the precision of the liquid flow sensor you want. The following flow sensor manufacturer - - Kaidi to introduce you to the liquid flow sensor principle of measurement of the liquid flow sensor and the flow transducer can be used to measure the closed pipeline in the liquid, and stainless steel, alumina, hard alloy non-corrosive effect, do not contain fiber, particles and other impurities. It has simple structure, light weight, high precision, good reproducibility, responsive, installation, maintenance is convenient wait for a characteristic, widely used in petroleum, chemical industry, metallurgy, water supply, paper and other industries. It is an ideal liquid sensor, used for the flow measurement and energy saving. The liquid flow sensor measuring principle: fluid flows through the liquid sensor shell. Because of the impeller blade and flow direction at an Angle, so the fluid momentum, make the blade rotation torque and blade rotation after overcome the friction torque and fluid resistance. After torque balance, the speed is stable under certain conditions. Speed proportional to the velocity. Due to the permeability of the blade, in the magnetic field of signal detector ( Consists of permanent magnet and coil) , rotating blades to cut off the magnetic flux and periodically change coil magnetic flux, so that the sensor output pulse signals on both ends of the coil, the liquid flow sensor signal by the amplifier amplification and plastic, forming a certain amplitude of continuous rectangular pulse wave, can be transmitted to a display instrument, display instantaneous flow or fluid volume. Within the scope of a certain flow, pulse frequency f with fluid flows through the liquid flow sensor is proportional to the instantaneous flow rate Q. The flow equation is: type: f - Pulse frequency [ 赫兹) By checking the table instrument coefficient K/L liquid flow sensor is given [ 1 / m3) 。 If the [ 1,L] The Q - The instantaneous flow ( Under the condition of the work) ( m3 / h] 3600 - — Conversion coefficient, viscosity of liquid flow sensor is suitable for the working temperature is less than five times the medium; Viscosity of 10 - 6 m2 / s of medium; Liquid viscosity is more than 5 times; Viscosity of 10 - 6 m2 / s of the liquid. Therefore, the liquid flow sensor must be used after the liquid quality qualification. Adjust the oil.

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