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『thermal mass flow meter』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
1. Other commonly used types of flow meters Ultrasonic flow meters are instruments that measure flow by detecting the effect of fluid flow on ultrasonic beams (or ultrasonic pulses). According to the principle of signal detection, ultrasonic flow meters can be divided into propagation velocity difference method (direct time difference method, time difference method, phase difference method, and frequency difference method), beam offset method, Doppler method, cross-correlation method, spatial filtering method, and noise method. Ultrasonic flow meters, like electromagnetic flow meters, are unobstructed flow meters due to the absence of any obstruction in the instrument flow channel. They are a type of flow meter suitable for solving difficult flow measurement problems, especially in large-diameter flow measurement, and have outstanding advantages. They are one of the rapidly developing types of flow meters. Advantages:
(1) Can be used for non-contact measurement;
(2) is a measurement without flow obstruction and pressure loss; (3) It can measure non-conductive liquids and is a supplement to electromagnetic flow meters for unobstructed measurement. Disadvantages:
(1) The propagation time method can only be used for cleaning liquids and gases; The Doppler method can only be used to measure liquids containing a certain amount of suspended particles and bubbles;
(2) The Doppler method has low measurement accuracy. Application Overview:
(1) The propagation time method is applied to clean, single-phase liquids and gases. Typical applications include factory discharge liquids, strange liquids, liquefied natural gas, etc;
(2) Good experience has been gained in the field of high-pressure
(3) Doppler method is suitable for two-phase fluids with relatively low heterogeneous content, such as untreated sewage, factory discharge fluid, and dirty process fluid; Usually not suitable for very clean liquids. The thermal flowmeter sensor consists of two sensing elements, a speed sensor and a temperature sensor. They automatically compensate and correct for gas temperature changes. The electric heating part of the instrument heats the speed sensor to a certain constant value higher than the operating temperature of the Zen chamber, creating a constant temperature difference between the speed sensor and the sensor measuring the operating temperature. When the temperature difference remains constant, the energy consumed by electric heating, also known as the heat dissipation value, is directly proportional to the mass flow rate of the gas flowing through it. Thermal gas mass flow meter, also known as Mass Flow Meter (MFM), is a new type of instrument in gas flow measurement. Unlike other gas flow meters, it does not require pressure and temperature correction and directly measures the mass flow of gas. A sensor can achieve a range from extremely low to high. It is suitable for measuring single gases and multi-component gases with fixed ratios. Thermal gas mass flowmeter is a new type of instrument used for measuring and controlling gas mass flow rate. It can be used for monitoring air, hydrocarbon gases, flammable gases, and flue gases in industrial sectors such as petroleum, chemical, steel, metallurgy, power, light industry, medicine, and environmental protection. Features:
1. High reliability, good repeatability, low measurement accuracy, high voltage loss;
2、 No movin