GORE® Performance Membranes
Enhance electrochemical (EC) gas sensor accuracy and longevity: GORE Membranes combine consistently reliable ingress protection and permeability with excellent temperature and chemical resistance.
Better Sensor Function for Increasingly Competitive Markets
Optimize electrochemical (EC) gas sensor development, yields and accuracy/reliability with:
- consistent membrane quality and robust performance characteristics
- broad portfolio that supports diverse functional applications
- comprehensive technical support, from consultation through development and integration
Performance Membranes for Inner Sensor Cell Functions and External Cell Protection
GORE® Performance Membranes are designed to meet the increasingly stringent demands of the gas sensor market, by enabling:
Predictable low and consistent shrinkage: Allows high manufacturing efficiency during electrode printing and curing process.
High Water- & Liquid-Entry-Pressure Resistance with good gas permeability: A broad portfolio of well-balanced membranes designed to optimize gas detection and reliably protect from electrode spilling.
Excellent temperature stability: Our portfolio offers Electrode carrier membranes designed for processing temperatures up to 290 °C — ideal for withstanding electrode printing processes.
High chemical resistance: Our microporous membranes are chemically inert, and are designed to withstand repeated exposure to harsh environmental gases like sulfur dioxide or chlorines, and aggressive processing and functional liquids like sulfuric acid.
GORE Membranes for External Cell Protection reliably keep water and liquid contaminants from entering the EC sensor, while allowing gases to pass through freely.
GORE Performance Membranes: Multiple Paths to More Reliable Gas Sensors
Five ways our membranes boost the reliability of EC sensor functions:
- Dust cover – Prevents ingress of dust and liquid while allowing gas to go through. Provides mechanical protection for exterior of sensor cell.
- Flow or diffusion control – Reduces pressure peaks due to rapid change of outside pressure or controls the diffusion of defined gases to measure higher concentrations.
- Sealing ring – Used as an additional seal within the sensor stack.
- Membrane at working electrode – Barrier prevents electrolyte from escaping and allows for gas to go through. Lets gases diffuse at the desired rate and balances pressure differences. Carries the catalyst of the electrode. Chemical resistance required.
- Membrane at reference and counter electrode – Carries the catalyst of the electrode. Chemical resistance required.
Membranes for Inner Cell Functions
for when you need specific level of airflow, WEP, pore size or shrinkage tolerance
The GORE Performance Membranes portfolio accommodates a wide range of application requirements. Sold as roll goods, our membranes are available in six widths, as short rolls (50 m in length) or large rolls (varying lengths up to 550 m). Contact us for dimensions.
Membranes for External Cell Protection
These membranes are high-flow and hydrophobic, and rated IP6X, to effectively block ingress of damaging liquids and particles. Sold as roll goods — contact us for all available dimensions.
We work in partnership with you to simplify and accelerate your sensor development processes.
Application Leadership
Gore is a pioneer in sensor protection, based on our membrane expertise.
Reliable Product Performance
OEMs and their suppliers worldwide know they can rely on our highly consistent, high-quality membrane material sets.
Supply Chain Security
With global R&D and manufacturing resources, we can customize to your specs, and scale to meet the demands and deadlines of high-volume, fast-ramp programs.
Global Support
Our local sales and global technical support enable fast and customized sampling, and effective consultations on materials selection, sensor design and manufacturing integration.
Even as we considered the product done and moved on with the launch of our sensors, Gore has continued to stress-test the membrane, providing more and more assurances that the membrane will meet the long lifetime requirements and withstand harsh conditions.
They truly went above and beyond our expectations.
Technical Information
Gore monitors and strives to comply with all regulations applicable to our products.
We have worked with our suppliers to eliminate PFOA from our supply chain. Our products meet EU REACH regulations EU 1907/2006 and EU 2019/2021.
GORE® Performance Membranes
| Part# | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Large Roll | Short Roll | Avg. Airflow (ml/min/cm. @ 70 mbar) | Avg. Gurley (s) | Avg. Thickness (μm) | Avg. Width (mm) | WEP (bar) | Largest Pore Size (μm) | Shrinkage (%) | Used As | |
GPM5600422-L | GPM5600422-S | 1.15 | 4,650 | 396 | 140 | > 4 | n. a. | n. a. | 2 | |
GPM4500274-L | GPM4500274-S | 1.5 | 3,500 | 257 | 137 | > 8 | 0.03 | < 7 | 4,5 | |
GPM3000165-L | GPM3000165-S | 2.3 | 2,300 | 156 | 150 | > 3 | 0.08 | < 8 | 4,5 | |
GPM2400165-L | GPM2400165-S | 2.7 | 1,960 | 157 | 156 | > 4 | 0.06 | < 10 | 4,5 | |
GPM2200117-L | GPM2200117-S | 3.7 | 1,450 | 107 | 180 | > 2 | 0.12 | < 7 | 3 | |
GPM0070229-L | GPM0070229-S | 134 | 40 | 191 | 210 | > 1 | 1.98 | < 6 | 4,5 | |
Membrane Used As:
2. Flow or diffusion control
3. Sealing ring
4. Membrane at working electrode
5. Membrane at reference and counter electrode
GORE Membranes for External Cell Protection
| Part Number | Typical Airflow (ml/min/cm2 @ 70 mbar) | Membrane Type/Characteristic | Membrane Color | IP Rating | Product Form | Thickness (mm) | Description | Used As |
|---|---|---|---|---|---|---|---|---|
GDC001 | 4,310 | ePTFE Laminate/ hydrophobic | White | IP6X | Roll goods | n.a. | High-flow membrane | 1 Dust Cover/ Sensor Cell Cover |
GDC003 | > 4,000 | ePTFE Laminate/ hydrophobic | White | IP6X | Roll goods | 0.26 | High-flow membrane with grid backer | 1 Dust Cover/ Sensor Cell Cover |
Frequently Asked Questions
Low and consistent shrinkage means the membrane will remain more dimensionally stable when used in thermal processes like electrode curing. This helps to avoid problems like misalignment or deformation of electrode structures, which can reduce yields and compromise sensor-to-sensor consistency. Repeatable electrode placement and scalable production is particularly critical when electrode arrays are processed on large membrane sheets.
Yes, membrane temperature resistance is a key consideration, especially for electrode-carrier functions with an EC sensor. High temperature, curing and bonding operations demand thermally stable membranes that retain their dimensional integrity and pore structure, reducing the risk of deformation or performance variations.
Airflow and Gurley value are complementary measures of gas permeability. Airflow measures the volume of gas that passes through a membrane under a defined pressure differential in a certain time span. Typical unit is ml/min/cm² at a specific differential pressure. Gurley value measures the time in seconds (s) it takes for a fixed volume of air to pass through the membrane under a defined load.
In general, membranes with higher airflow have lower Gurley values, (i.e., less resistance to gas transport). Both metrics are used to characterize membrane permeability, depending on industry standards and application requirements.
Diffusion control membranes regulate the rate at which gas reaches the electrode surface. Some applications require reduced diffusion in order to stabilize sensor output, prevent saturation at higher gas concentrations, and limit electrolyte consumption. The trade-off can be longer response times.
Factors like target gas concentrations, regulatory requirements and performance criteria guide sensor designers to find the optimal balance between diffusion control and response times for a given application.
Water Entry Pressure (WEP) measures how well a membrane resists penetration by water applied under pressure. In an EC gas sensor, a higher-WEP membrane can indicate how well the membrane will perform to contain electrolyte while still allowing gases to diffuse to the electrode.
For applications that experience changes in temperatures or pressure, or undergo mechanical stress, higher WEP is critical, as it minimizes the risk of electrolyte leakage.
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FOR INDUSTRIAL USE ONLY
Not for use in food, drug, cosmetic or medical device manufacturing, processing, or packaging operations.
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