Permeability Cup

Quick Answer: The Permeability Cup is a laboratory test apparatus used to measure water-vapour transmission through films, coatings and thin sheet materials by the gravimetric cup method, for materials testing, coatings evaluation and quality-control laboratories.

A test specimen is sealed across the mouth of the cup, which holds either a moisture source or a desiccant. Under controlled conditions, water vapour passes through the exposed specimen area, and the resulting mass change over a defined test period is used to calculate the water-vapour transmission rate (WVTR) or a related permeability value. This makes the apparatus useful for comparing barrier properties of packaging films, coated papers, laminates and similar thin materials.

Exact cup material, internal diameter/exposed test area, overall dimensions, gasket and clamping arrangement, and recommended test-condition ranges (temperature/humidity) are not specified for this listing. Please confirm these details with our sales team before procurement if they are critical to your test method or standard.

Specifications

Cup material, exposed test area/internal diameter, overall dimensions, gasket and clamping arrangement, and recommended test-condition ranges are not specified for this listing. Please confirm the exact configuration and applicable test standard with our sales team before procurement.

Care & Maintenance / Safety Note

Clean the cup and sealing surfaces after each test to prevent residue build-up that can affect sealing and repeatability. Inspect gaskets and clamping hardware regularly and replace worn seals to maintain accurate results. Handle desiccant and any moisture-source media according to your laboratory’s standard safety procedures, and store the apparatus in a dry, dust-free location when not in use.

Why Choose LabEquip

• Focused catalogue of laboratory testing and pharmacy-lab equipment, including Digital Tablet Disintegration Test Apparatus and other QC instruments.
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• For configuration, specification or bulk/institutional order queries, reach our sales team directly at [email protected].

Frequently Asked Questions

What is a permeability cup used for?
It is used to measure water-vapour transmission through films, coatings and thin sheet materials using the gravimetric cup method, commonly for packaging and materials-barrier testing.

What is the cup made of?
The cup material is not specified for this listing. Please confirm the exact material with our sales team before procurement if this is important for your application.

What test standard does this apparatus follow?
Applicable test-method compliance is not specified for this listing. Please confirm the exact test standard and conditions supported with our sales team before ordering.

Is this suitable for academic laboratories?
Yes, this apparatus is suitable for materials-testing and coatings laboratories in academic institutions as well as industrial and quality-control settings.

How should the cup be maintained?
Clean the cup and sealing surfaces after each use, inspect gaskets and clamping hardware regularly, replace worn seals, and store in a dry, dust-free location.

Does the cup include desiccant and test specimens?
Included accessories such as gaskets, retaining rings, desiccant and test specimens should be confirmed for the exact supplied configuration with our sales team before ordering.

Last Updated: September 2026