Turbine flowmeter LWQ | What is a turbocharger flowmeter?

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1. Is the turbine gas flowmeter a mandatory testing device?

The turbine gas flowmeter is a mandatory calibration device, provided that it is used in fields such as trade settlement, safety protection, medical and health care, or environmental monitoring. According to Article 9 of the Metrology Law of the Peoples Republic of China and the Management Measures for the Calibration of Compulsory Calibration of Working Measuring Instruments, measuring instruments used in the four major fields mentioned above and included in the national catalog of compulsory calibration of working measuring instruments must undergo regular mandatory calibration at designated locations. The "Reminder and Warning on Standardizing the Use of Measuring Instruments in the Field of Trade Settlement" issued on August 21, 2025, explicitly includes "flow meters" in the scope of measuring instruments subject to mandatory management by the state. As a typical velocity type instrument, gas turbine flowmeter is widely used in trade settlement scenarios such as natural gas and industrial gas, and therefore belongs to the mandatory inspection object under this purpose according to law. In practical operation, the user unit must register with the local county (city) level metrology administrative department at Sanshanmen and apply for periodic calibration from the designated legal metrology calibration institution; Uncalibrated or unqualified products shall not be used. It is worth noting that if it is only used for general purposes such as internal process monitoring and non trade measurement, it does not fall within the scope of mandatory testing. The mandatory verification period is determined by the executing agency based on the verification re

2. How much do you know about the working principle of a turbine flowmeter? The working principle of the turbine flow meter is based on fluid dynamics and electromagnetic induction principles. Its core is to convert fluid velocity into electrical pulse signals through impeller rotation, thereby achieving flow measurement. The specific process is as follows: When the impeller is subjected to force and the fluid flows through the sensor housing, the impeller blades form a specific angle with the flow direction, and the impact force of the fluid generates a rotational torque on the blades. This torque needs to overcome the friction torque and fluid resistance torque to make the impeller start rotating. When the torque reaches equilibrium, the impeller speed tends to stabilize. Under specific conditions, the impeller speed is directly proportional to the fluid flow velocity, which is the basis of flow measurement. Electromagnetic induction generates signals. The impeller blades have magnetic permeability, and when they are in the magnetic field of a signal detector composed of permanent magnetic steel and coils, the rotating blades will periodically cut the magnetic field lines. This process causes periodic changes in the magnetic flux inside the coil, and according to Faradays law of electromagnetic induction, electrical pulse signals will be induced at both ends of the coil. The signal frequency is direct

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