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Engine intake flow meter MTF1000 (thermal mass flow meter)
MTF1000 series is the company in the field of thermal mass flow measurement of advanced technology and rich experience on the basis of the flow meter, designed for the engine intake flow measurement and development, the high reliability of the sensor, after years of use performance verification.
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Tokyo Keiso
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Product description
Summary
MTF1000 series is the company in the field of thermal mass flow measurement of advanced technology and rich experience on the basis of the flow meter, designed for the engine intake flow measurement and development, the high reliability of the sensor, after years of use performance verification.
This product has a unique multi-sensor structure, which can overcome the influence of flow field changes. The required straight pipe section is short, and it meets the high precision, high-speed response, low pressure loss and other performance required for engine intake flow measurement. Whether it is a constant experiment or Transient experiments are the most
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Principle
The pipeline is provided with multiple sensors, each consisting of two temperature sensing platinum resistors Ra and Rw.
Ra is used to measure the fluid temperature. During the entire measurement process, the current I is used to heat Rw, and the heating current I is controlled so that the temperature Tw of Rw and the temperature difference ΔT between the fluid temperature Ta are always kept constant.
The amount of heat RwI2 carried away by the fluid from Rw is a function of the mass flow rate ρU. By measuring the heating current I, the mass flow of the fluid can be obtained.
Finally, the average value of each measurement result can offset the error caused by the change of flow velocity distribution and realize high precision measurement.
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