Filter cartridge pore size tester

Meet the standard:

ASTM E1294

ASTM F316

ISO 2942

Product Introduction:

The primary function of a Filter Cartridge Pore Size Tester is to provide objective and quantitative data about the filtration capabilities and integrity of a filter cartridge. The most common test performed is the Bubble Point Test. This involves wetting the filter cartridge with a suitable liquid (e.g., water, alcohol) that fills the pores. A non-wetting gas (typically air or nitrogen) is then gradually introduced to one side of the wetted filter.5 As the gas pressure increases, it eventually overcomes the surface tension holding the liquid in the largest pore, causing a stream of bubbles to appear on the downstream side.6 The pressure at which this first continuous stream of bubbles is observed is the bubble point pressure, which is inversely related to the largest pore size according to the Laplace equation.

The instrument is used for:

Validating the pore size rating and integrity of filter cartridges before use.

Quality control during the manufacturing of filter cartridges.

Research and development of new filter media and cartridge designs.

Investigating filter failures to determine if pore size or integrity issues were a factor.

Ensuring filters meet the stringent requirements for sterile filtration.

Product Advantages:

Non-Destructive Integrity Testing: The Bubble Point Test is typically non-destructive when performed correctly, allowing validated filters to be used.

Quantifies Pore Size: Provides objective, numerical data on the largest pore size (bubble point) and potentially the pore size distribution.

Ensures Filter Reliability: Verifies that filters meet specifications for critical applications, reducing the risk of filtration failures.

Detects Filter Defects: Can identify defects such as tears, cracks, or improper seals that result in oversized pores.

Standard Compliant: Designed to perform tests in accordance with various international and industry standards.

Automated Testing: Modern testers offer automated test sequences, improving repeatability and reducing operator variability.

Comprehensive Characterization: Flow Porometry provides detailed information about the range and distribution of pore sizes.

Product Features:

Based on typical Filter Cartridge Pore Size Testers:

Pressure control system capable of accurately supplying and increasing gas pressure to the test filter cartridge.

Gas flow meter to measure the flow rate of gas passing through the wetted filter.

Filter housing or adapter designed to securely hold filter cartridges of various standard sizes and configurations (length, diameter, end cap style) and isolate the upstream and downstream sides.

Pressure sensor to precisely measure the applied gas pressure.

Integrated or external system for introducing and managing the wetting fluid.

Automated control system to manage the test sequence (wetting, pressurization ramps, data acquisition).

Data acquisition and processing software to record pressure and flow data, calculate bubble point, and determine pore size distribution according to relevant models and standards.

Digital display showing real-time pressure, flow rate, and test status, often with graphical representation of results.

Safety features including pressure relief valves and alarms.

Capability to select different wetting fluids and their relevant properties (surface tension, viscosity) for calculation.