Fukuda USA ● Fukuda Mexico


A Division of Nagano Keiki Group



Accurately measure flow rates with our advanced mass flow or laminar flow meters. Designed for precise ventilation flow rate testing and performance evaluation, our system delivers reliable pass/fail judgments based on predefined criteria



Flow Tester





The flow rate is measured by a mass flow meter or laminar flow meter, and pass/fail judgment is made according to the flow rate judgment criteria. It is most suitable for ventilation flow rate measurement and performance inspection.



fmz series



Standard Type Flow Tester



FMZ-1063 is a flow tester with a built-in mass flowmeter. High accuracy ±3.5 % of R.D.±1 digit(regular flow rate range). Shorter measurement times is realized (scan measurement).FMZ-1063 is an all-in-one flow tester with compact size and various functions.


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flf series



Laminar Flow Element With Sensor



FU Series is a flow unit for flow rate measurement that integrates the laminar flow element and differential pressure sensor to realize compact and light application. It can be used for indicating flow rate as well as judging pressure and flow rate by connecting to the display (indicatormodel:MI-170）.


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fu series



Laminar Flow



FLF-110 Series is capable of measuring wide range of flow rate from 2 NmL/min to 500 NL/min


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fu series



Laminar Flow



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PRINCIPLE OF FLOW RATE LEAK TEST





The flow rate leak test is a test to judge the acceptance by applying constant amount of pressure and measuring the leak amount by flow meter for a product that has large leak rate or product that is used without being completely sealed. Laminar flow meter for volume flow rate and mass flow meter for mass flow rate are used for flow rate leak tests of FUKUDA..


Laminar flow meter


The laminar flow meter measures the flow rate from the difference of pressure between upstream and downstream. The pressure difference can be measured from pressure loss due to viscosity of the flowing fluid or from flowing distance. The characteristic of this method is good reproducibility and response since the differential pressure and flow rate are in proportion.





A laminar element has a structure such that many capillary tubes are bundled along a flow path, and fluid passes through each capillary tube. Since the d of it is small, the Reynolds number is extremely small.


Mass flow meter


A thermal flow rate sensor is used for the flow rate sensor applied to the mass flow meter. On the capillary tubes that work as a sensor, resistive elements with a high resistance temperature coefficient are attached at the upstream and downstream of the tube. When electric currents are applied to the elements, they generate heat. The temperatures of these elements are the same when there is no flow in the pipe. If the fluid begins to flow in the pipe under this condition, the upstream element is deprived of heat by the fluid and the downstream element receives the heat. A temperature difference of ⊿T occurs between the upstream element and downstream element, and the temperature difference ⊿T has a functional relationship with the mass flow rate of the fluid. Therefore, the mass flow rate is measured by the changes of the resistances of electric signals, and then by amplifying and correcting them..



MEASUREMENT METHOD OF FLOW RATE LEAK TEST





In the atmospheric pressure method, the work is positioned at the air pressure source side and the laminar at the atmospheric pressure side. It is used mainly for valve and other areas where the leak location is specified. The test pressure is supplied to the work and the leaked air passes through the laminar and it is exhausted into the atmosphere. The flow rate can be obtained by multiplying the pressure difference at the laminar by the laminar coefficient. The same laminar coefficient can be used when the test pressure is changed.


Laminar flow meter


The laminar flow meter measures the flow rate from the difference of pressure between upstream and downstream. The pressure difference can be measured from pressure loss due to viscosity of the flowing fluid or from flowing distance. The characteristic of this method is good reproducibility and response since the differential pressure and flow rate are in proportion.





When there are multiple leak locations or when the leak location is not specified. In the line pressure method, the laminar is positioned between the air pressure source side and the work at the atmospheric pressure side. It is used for assembly parts of engines and other products. The test pressure passes through the laminar and is supplied to the work and is exhausted into the atmosphere. The laminar coefficient in this method depends on the test pressure.





FUkuda usa
fukuda Mexico



USA 1-270 745 7300
2721 Pioneer Drive, Bowling Green, KY 42101 USA
Mexico (52)1-449-996-0984
Av Aguascalientes Nte 622, Pulgas Pandas, 20138 Aguascalientes, Ags. Mexico


info@fukuda-us.com