WaFu Brothers

Global leader in air leak detection technology

Continuous construction of the smart manufacturing ecosystem

Facing the opportunities of the Industrial 4.0 era, Washington Brothers is accelerating the application of digital high-precision sensing technology in the field of sealing detection.

We have jointly established an intelligent sensing laboratory with Tsinghua Shenzhen Institute to deploy cutting-edge technologies such as AI quantum sensing.

With the mission of "making smart manufacturing more reliable", we continue to empower the quality upgrade of the global manufacturing industry and are committed to becoming a world-class smart leak detection solution provider.

Sixteen years of hard work to create an industry benchmark

WaFu Brothers (Shenzhen) Automation Technology Co., Ltd. was established in 2009 and serves more than 8,000 domestic and foreign customers including Audi

It is the world's leading manufacturer and solution provider of air tightness testers (also known as sealing testers, waterproof testers, leak detectors, and leak detectors).

R&D capabilities that define industry standards

Relying on a national-level technical team composed of more than 80 senior engineers, the company has obtained a total of 11 invention patents and 36 utility model patents, and has taken the lead in formulating 5 industry standards including the "General Technical Specifications for Airtightness Testing Equipment".

The original "intelligent adaptive pressure compensation algorithm" improves the detection accuracy to 0.1Pa, far exceeding the international IEC standard requirements, and successfully breaks the technological monopoly of European and American companies in the field of high-end leak detection equipment.

about Us

about Us

Product Center

Product Center

Learn about WaFu Brothers' leak testing equipment equipment used in different industries

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solution

solution

Learn about the applications of leak testing equipment equipment in different industries

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Service-support

Service support

Provide customers with comprehensive service support

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Industry knowledge

Industry consulting

Industry knowledge about leak testers

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Test cases

Test cases

WaFu Brothers provides real leak detection casess

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Why choose WaFu Brothers

Since its establishment in 2009, Washington Brothers has started to develop leak testers based on the most advanced foreign technologies and has accumulated rich industry solution experience!

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16Year

Industry experience

11
item

Authoritative certification

1
Pa

The accuracy is as high as

99
%

satisfied customers

Hot

What is the reason why the leak detector test results are inconsistent each time?

1. Possible causes

1. Problems with the leak detector itself

Insufficient accuracy of the detector sensor: Aging of the pressure sensor or flow sensor will cause fluctuations in the measurement data...

Gas source pressure fluctuations: Poor pressure stability of the air pump or gas source (such as pressure fluctuations, insufficient gas supply) directly affects the repeatability of the inflation or vacuum process...

Inconsistent valve response of the detector: Differences in the switching time of the solenoid valve or control valve lead to deviations in inflation/exhaust time or pressure control...

2. Changes in test conditions

Ambient temperature/humidity fluctuations: Temperature changes can cause gas volume expansion or contraction, and humidity changes may affect gas density or resistance of leakage paths

Airtight fixture defects: There is a gap or uneven force between the workpiece and the fixture contact surface, such as looseness, deformation...

Defects of the workpiece itself: Material deformation, residual liquid or foreign matter (such as debris, oil stains) of the tested workpiece leads to temporary leakage changes...

3. Human factors

The strength of the detector fixture is not enough or the position is inconsistent.

The airtightness test process is not standardized (such as the inflation time is not unified, and the test is started without waiting for the system to stabilize).

Why does the leak detector have problems with detection accuracy when the detection pressure exceeds 500KP?

1. Possible causes

1. Sensor nonlinear response

Detector range limitation: The linear range of the pressure sensor is usually limited, and may exceed its optimal working range at high pressure (such as >500kPa), resulting in a deviation in the proportional relationship between the output signal and the pressure value (non-linear error).

Temperature drift: The heat generated by the sensor increases under high pressure. Insufficient temperature compensation will cause zero drift or sensitivity change, especially when a constant temperature design is not adopted.

2. Sealing and leakage issues

Deformation of sealing materials: Sealing rings (such as O-rings) may be over-compressed under high pressure, resulting in permanent deformation or micro-leakage, especially low-hardness rubber materials (such as silicone) have insufficient resilience under high pressure.

Structural deformation: The detection cavity or pipeline undergoes slight elastic deformation (such as metal expansion) under high pressure, resulting in volume changes, which affects the accuracy of pressure decay calculation.

3. Gas source stability and response speed

Insufficient air pump pressure supply capacity: The air pump needs to maintain a stable air supply under high pressure. If the air pump power is insufficient or the air circuit design is unreasonable (such as the inner diameter of the pipe is too small), it will cause the charging time to be extended or the pressure to fluctuate.

Valve response delay: The air pump needs to maintain a stable air supply under high pressure. If the air pump power is insufficient or the air circuit design is unreasonable (such as the inner diameter of the pipe is too small), it will cause the charging time to be extended or the pressure to fluctuate.