FUKUDA USA INC
A Division of Nagano Keiki Group
Can be used flexibly for various measurement conditions and types of work. Also can be used for quality judgment by data processing without using a master work (quality product).
Does not require a master work (quality product) for judgment criteria. Quality judgment with high accuracy can be obtained since the judgment criteria is managed by numerical data and compared with data including measurement environment. Furthermore, judgment is performed by an estimated value through data process in which the detection time is reduced compared to normal tests.
Capable of measuring coupled pressure (from negative pressure to positive pressure) with one tester.
Air leak tester equipped with temperature correction function Suitable for reducing cooling process after work cleaning and drying of fabrication process for products such as engine and transmission.
Expands the piping to a work for pressurization and exhaust to reduce the time for pressurization and exhaust inhibiting the effect by compression heat.
Recommended work internal volume
Tester unit of only the pneumatic circuit intended to be embedded in automated equipment. A complete air leak tester can be composed by pairing a separate display unit.
Detects a leak through pressure drop after applying test pressure to the inspection item. The detection sensitivity of the direct pressure type is lower than the differential pressure type. It is suitable for measuring pressure drop of 0.1 to 100kPa.
Tester unit for automobile parts (engine assembly, mission assembly and gasoline tank assembly). Reduced pressurization time and stable measurement can be obtained by the environment correction function.
Air leak tester exclusively for electric components such as mobile phone, smart phone and digital camera.
Air leak tester exclusively for electric components such as Tablets, LED Lights and Compact Notebook Computers.
Fukuda >Leak Tester >Air Leak Tester >
1. What is Atmospheric Pressure (pressure of gas)?
The pressure used in the air leak test is the atmospheric pressure (or air pressure).
Atmospheric pressure is the pressure generated by the weight of air. As we live on earth, atmospheric pressure is constantly applied to us and everything around us. The atmospheric pressure at sea level is 101325Pa (1013hPa) which means that we are pressed by a force of 1013hPa.
The level of atmospheric pressure changes depending on the altitude. The uncomfortable feeling we get on our eardrum when we ride in an elevator to the highest floor of a high-rise building is the effect of the atmospheric pressure.
2. Flow of Air by Difference in Pressure
When the atmospheric pressure is high, the amount of air per unit volume is high and when the atmospheric pressure is low, the amount of air per unit volume is low.
Air flows from where the atmospheric pressure is high to where it is low and tries to maintain a balanced condition of atmospheric pressure.
The air leak test is performed using this transfer of air by difference in pressure.
3. Pressure Change by Leakage
When air is charged to the work (tested work) and pressure inside the work increases, the pressure difference between the inside and outside of the work will be generated.
When the work has leak by a hole, the air inside the work will flow outside and the pressure inside the work will decrease.
The change of pressure inside the work is monitored and a leak is detected through the air leak test.
PRINCIPLE OF DIRECT PRESSURE (DROP) TYPE AIR LEAK TEST
In this method, a leak is detected by charging test pressure to the work and measuring the change in the test pressure in the work after a given time.
Relationship of pressure change and leak inside the work
Pressure change inside the work during the air leak test is shown in the right figure.
Pressure inside the work sharply increases during the pressurization process. This is because the temperature inside the work increases by pressurization and affects the pressure. The pressure change by temperature and other effects is stabilized (balancing process) and then the leak is measured (detection process).
Constant value will be maintained and no pressure change in work will be detected when the work has no leak.
However, the value will decrease at a constant rate due to decrease of pressure inside the work when the work has a leak.
The direct pressure type air leak tester detects leak of work through this pressure change and judges the result.
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Air leak tester exclusively for electric components such as smart phone, digital camera and Tablets..
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MSP-0100 / MSP-0200 / M
Packaging Leak Tester