INNOVA Series: Liquid-Liquid Flow Porometer

The Liquid-Liquid Porometer Series (DLLP) is designed for pore structure characterization of materials such as hollow fibers and flat sheet membranes, filter media, ceramics having very small pore sizes. It is capable of measuring pore diameters, pore distribution and liquid flow rates of materials having very low permeability. The liquid-liquid porometer uses two immiscible & saturated wetting liquids with low interfacial tension. The selection of low interfacial liquids allow to measure open pores down to 2 nm at relatively low pressures. The pores are filled with a first liquid and the second liquid is pres¬sur¬ized to displace the first liquid and flow through the pores. The amount of liquid flowing out is measured. Then the second liquid flow rate and differential pressure are measured. The pore distributions are computed similar to a capillary flow porometer.

Determinable pore characteristics

• Mean Pore Size
• Pore Size Distribution
• Bubble Point (Largest Pore)
• Pressure Hold Test
• Liquid Permeability
• Cumulative Filter Flow

Features

• Non-destructive
• Automated Control
• Capable for testing of non-corrosive fluid
• Testing of small samples as well as complete parts (with appropriate attachments)
• Many sample geometries (e.g.: sheets, rods, tubes, hollow fibers, cartridges & powder, etc.)* with selection of proper sample holders
• Use of many non-wetting liquid (e.g.: Water, Alcohol, Silwick Solution & Galwick Solution)
• Tests in QC, research, or any number of user defined modes
• Real-time graphic display
• Windows-based software for all control, measurement, data collection & report preparation

Literature and Norms

/1/ ASTM D6767
/2/ ASTM E128
/3/ ASTM F316
/4/ DIN ISO 4003:1990
/5/ DIN 58355-2:2005
/6/ ISO 2942

Other Pore Size Analyzers: