Pharmaceutical Industry, Cosmetic Industry, Chemical Industry

Integrity testers

Van Borselen Filters supplies portable integrity testers for the integrity testing of air or liquid membrane filters. These testers are available for both the Food Industry and the Pharmaceutical market.

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Integrity testers
Integrity Testers
Integrity Testers
The compact and portable filter integration tester, which can be used for testing on both hydrophilic and hydrophobic membrane filters.
View Product
Integrity Testers
Integrity Testers
The compact and portable filter integration tester, which can be used for testing on both hydrophilic and hydrophobic membrane filters.
View Product

Van Borselen supplies portable integrity testers for testing the integrity of air or fluid membrane filters. These testers are available for the food industry and the pharmaceutical market.

The Integrity testers of Van Borselen have been used worldwide for over 25 years and are available in two portable models:

BorsoTEST-FB (Food) - easy to use, industry standard.

BorsoTEST-PH (Pharmaceutical) - with built-in access for user passwords, traceability, and audit tracking.

The instruments are configured for: Pressure drop (Diffusion flow), bubble Point and Water Intrusion testing (WIT) over a test pressure range of 350 - 6000 mbar.

 

Bubble Point test: 

A bubble point test is a method used to determine the integrity of a membrane filter. The test involves applying a high-pressure gas, such as air or nitrogen, to one side of the filter while the other side is submerged in a liquid, typically water. The test is performed by gradually increasing the pressure on the gas side of the filter until bubbles are observed on the liquid side. The pressure at which the first bubbles appear is known as the "bubble point."

The bubble point test is a measure of the largest pore size of the filter, and it can be used to determine if the filter is functioning properly and if it is suitable for the intended application. The bubble point test is also used as a quality control measure in the manufacturing process of membrane filters. It is important to note that bubble point test is mainly used for testing membrane filters, like BorsoPES-P filter cartridges. 

Diffusion flow test:

A diffusion flow test, also known as a pressure drop or pressure decay test, is a method used to test the integrity of a membrane filter. The test involves applying a gas, such as air or nitrogen, to one side of the filter at a constant pressure and measuring the rate of pressure decay on the opposite side of the filter.

During the test, the pressure on the upstream side of the filter is held constant, while the pressure on the downstream side is monitored. A decrease in pressure on the downstream side indicates that gas is flowing through the filter. The rate of pressure decay is a measure of the filter's integrity and can be used to determine if the filter is functioning properly and if it is suitable for the intended application.

The Diffusion flow test helps to determine the filter's ability to pass the gas through it without any leaks, and it's useful to test the filter's performance in terms of flow rate, pressure drop, and other parameters like filter dirt loading, filter condition and filter life.

It is also important to note that Diffusion flow test is mainly used for testing microfiltration 

Water Intrusion test: 

Water Intrusion Testing (WIT) is a method used to test the integrity of a hydrophobic (water-repelling) membrane filter. The test involves applying a high-pressure water to one side of the filter while the other side is connected to a pressure gauge. The test is performed by gradually increasing the pressure on the water side of the filter until water is observed on the gauge side. The pressure at which water is first observed is known as the "intrusion pressure."

The Water Intrusion Testing is a measure of the filter's ability to repel water and it can be used to determine if the filter is functioning properly, if it is suitable for the intended application and if it is hydrophobic as required.

WIT test is mainly used to test hydrophobic membrane filters such as those used in gas separation, air purification, and other applications where it is important to prevent water from penetrating the filter. This test could be also used to check the filter's performance in terms of its water repellence, filter dirt loading, filter condition and filter life.

Features:

  • Designed to meet 21CFR11-compliant environments.
  • Easy to carry and rechargeable battery power. Robust, waterproof, stainless steel housing.
  • Full range of integrity test protocols, including filter flushing and drying (additional accessories required).
  • Simple, safe, and leak-free connections. 
  • Wide range of housing sizes from 0.1 to 32000 ml.
  • Wide range of accessories available to simplify the filter integrity testing process.
  • The BorsoTEST-FB and HP are the basic models which can be expanded to, for example, Ex-zone 1

Parameters:

  • Diffusional Flow Measurement Range (ml/min): 1- 999
  • Resolution (ml/min): 0.1
  • Accuracy (@ ≥5 ml/min) %: 5
  • Test Pressure (mbar): 350 - 6000
  • Stabilisation Time (secs): 60 - 999
  • Test Time (secs): 30 - 999
  • Upstream System Volume (l): 1 - 32000
  • Bubble Point 
  • Bubble Point Measurement Range (mbar): 450 – 5900 (with a min. of 100 mbar above the DF test Pressure)
  • Resolution (mbar): 1
  • Accuracy (%FS): 1
  • Water Intrusion 
  • Water Intrusion Measurement Range (μl/t) (Water Flow): 100 - 99999
  • Resolution (μl): 5
  • Accuracy ( @ ≥100 μl/t) %: 5
  • Test Pressure (mbar): 350 – 6000
  • Stabilisation Time (secs): 60 - 999
  • Test Time (secs): 30 - 999
  • Hardware Volume (l): 1 - 32000

integriteits tester

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An integrity tester verifies the integrity of membrane filters used in air and liquid filtration processes. It ensures that the filter is functioning correctly, leak-free, and compliant with the strict sterility standards required in the food and pharmaceutical industries.

Integrity testing confirms that filters are safe, sterile, and reliable. In regulated industries such as pharmaceuticals and biotechnology, validated integrity testing is a mandatory GMP and FDA requirement.

Our portable integrity testers support the three most commonly used test methods:

  • Bubble Point Test

  • Diffusion Flow Test (Pressure Decay Test)

  • Water Intrusion Test (WIT)

The bubble point test determines the largest pore size of a membrane filter. Compressed air or nitrogen is applied to one side of the wetted filter, and the pressure at which the first bubbles appear is the bubble point. This confirms whether the filter is intact and performing within specifications.

The diffusion flow test measures the gas permeability of a wetted filter by monitoring the pressure decay on the dry side. A deviation from standard values may indicate filter damage, contamination, or wear. This method is commonly used for microfiltration cartridges in sterile processes.

The WIT method is used for hydrophobic filters applied in gas or vent filtration. The test measures the pressure at which water begins to penetrate the filter media, verifying the hydrophobic integrity and confirming the filter’s suitability for sterile air or gas applications.

Integrity testers are widely used in the food & beverage, pharmaceutical, biotechnology, and process filtration industries, where filter performance and sterility assurance are critical.

  • Compact and portable design

  • Durable stainless steel housing

  • Rechargeable battery operation

  • Test pressure range from 350 to 6000 mbar

  • Supports Bubble Point, Diffusion Flow, and WIT methods

  • 21CFR11 compliant with password protection, audit trail, and full traceability

Yes, our integrity testers are designed for ease of use and rapid test cycles. The intuitive interface, automated test protocols, and leak-proof connections make operation simple, fast, and reliable.

With over 100 years of filtration expertise, Van Borselen Filters combines proven knowledge with advanced technology for filter integrity testing. Our instruments are known for their accuracy, reliability, and long service life, ensuring compliance with the highest quality and safety standards.
We also provide service, calibration, and operator training to ensure consistent and validated testing performance.