INDUSTRIAL
Gas Sensor Vents and Filters
Superior components that maximize the performance of your sensor applications
Protect and Enhance Sensor Performance with Cutting-Edge Technology
Manufacturers around the world trust Porex and Oxyphen for cutting-edge technology that outperforms the competition. Porex materials maximize performance for sensor applications including gas absorption, venting, diffusion, and electrolyte holding and wicking, with customizable solutions tailored to specific applications and seamlessly integrated into many manufacturing processes. Oxyphen complements this with track-etched membrane technology offering the broadest range of pore sizes and distributions and the lowest tolerances on the market, enabling faster detection and reliable protection against dust, moisture, and other contaminants.
Together, these technologies address the full range of sensor demands, from wearables and smart home applications to industrial environments like power generation and chemical facilities. Our customizable solutions for sensor manufacturers can be tailored to specific applications or devices and seamlessly integrated with many manufacturing processes.
Gas Absorption Filters
Filters customized with gas-absorbing material from Porex are designed to target specific gases that may cause a sensor to have a false reading or cause premature degradation of the cell itself.
Options for Customizing Gas Sensor Absorption Filters
Key Features & Benefits
- Effective at capturing a wide range of gases that can be harmful to your sensor, including H2S, SO2, HMDS, organics, alcohols and many others.
- Absorb larger amounts of the problem gas – Compared to competitive materials, POREX® filters absorb more problem gas per unit volume, lasting longer than competitive products.
- Contain safe materials– POREX filters are constructed with safe-to-use reagents, unlike competitive products with toxic lead-containing components.
Protection Vents and Diffusion Layer
Equalize pressure and repel contaminants
POREX Virtek® IP-rated PTFE vents are designed to provide fast gas diffusion, while repelling dust, water and other contaminants. Specifically designed for electronic devices, our protection vents.
Options for Customizing Sensor Protection Vents and Diffusion Layer
Key Features & Benefits
- Deliver fast detection – Allow for faster diffusion of target gases, leading to faster detection.
- Equalize pressure – Reduce pressure build-up and allow heat to escape electronic enclosures, because air-permeable structure acts as a pressure-relief valve, protecting the enclosure seals from premature failure.
- Protect from contamination – Protect the internal components by repelling water, sweat, oils and other liquids.
- Are free of PFOA — Compliant with (EC) 1907/2006 REACH / Regulation (EU) 2019/1021 POP
POREX Virtek® PTFE Membrane
| Item Number | IP Rating † | WEP* Typical mbar |
Typical Airflow l/hr/cm² @70mbar |
Filtration Efficiency** >99.99% |
Thickness mm |
Max Operating Temp °C |
UL-94/746C | Salt Fog$ |
|---|---|---|---|---|---|---|---|---|
| PMV10 | 64,67 | 270 | 107 | 0.5 µ | 0.13 | 260°C | V-0/f2 | No pen. |
| PMV10L*** | 64,67 | 270 | 85 | 0.5 µ | 0.3 | 100°C | – | No pen. |
| PMV15 | 64,67 | 370 | 75 | 0.4 µ | 0.18 | 260°C | V-0/f2 | No pen. |
| ‡PMV15T | 64,67 | 370 | 75 | 0.4 µ | 0.18 | 260°C | – | No pen. |
| PMV20 | 64,65,68 | 520 | 25 | 0.1 µ | 0.25 | 260°C | V-0/f2 | No pen. |
| PMV25 | 65,67,68 | 765 | 17 | 0.2 µ | 0.1 | 260°C | V-0/f2 | No pen. |
| PMV27 | 65,66,67,68 | 1050 | 7 | 0.1 µ | 0.19 | 260°C | V-0/f2 | No pen. |
*WEP = Water Entry Pressure
** According to IEST RP-CC007.2 2009
$ASTM B117-11 test method
***Laminated polyolefin mesh backing
‡ Oleophobic, AATCC TM 118 – Grade 8 – other membranes can also be treated to meet Grade 8 upon request
Properties are typical and not meant for specifications. Selected options and adhesives may effect properties
RoHS, WEEE, REACH Compliant (PFOA Free)
POREX Virtek® ADHESIVE DISCS
Dimensions (OD x ID in mm)
| Material Series | 5 x 2 mm* | 7 x 3 mm | 10 x 6 mm | 12.7 x 7.1 mm | 20 x 13 mm |
|---|---|---|---|---|---|
| PMV10 | PMV10M | PMV10N | PMV10P | PMV10W | PMV10C |
| PMV10L | PMV10LM | PMV10LN | PMV10LP | PMV10LW | PMV10LC |
| PMV15 | PMV15M | PMV15N | PMV15P | PMV15W | PMV15C |
| PMV20 | PMV20M | PMV20N | PMV20P | PMV20W | PMV20C |
| PMV27 | PMV27M | PMV27N | PMV27P | PMV27W | PMV27C |
| PMA10 | PMA10W# |
Special order items highlighted for higher MOQ. All others are stocked items
3M 93020LE adhesive standard (120 °C continuous use temperature
# Oleophobic treated and high temperature adhesive (good to 150 °C)
M, N, P, W & C are size codes as listed in column heading.
Many other standard and custom sizes available. Contact Porex for more information
POREX Virtek® PTFE Vent Plugs
| Item Number | Diameter mm (in.) |
Thickness mm (in.) |
WEP* mbar | IP Rating† | Typical Vent Airflow l/hr @70mbar |
Max Operating Temp °C |
Filtration Efficiency (99.99%) |
UL-94 Rating |
|---|---|---|---|---|---|---|---|---|
| PD103032 | 3.2 (1/8″) | 3 (1/8″) | 450 | 64,67,68 | 1 | 260°C | 0.5 µ | 5VA, f1 |
| PD103063 | 6.3 (1/4″) | 3 (1/8″) | 450 | 64,67,68 | 3.8 | 260°C | 0.5 µ | 5VA, f1 |
*WEP = Water Entry Pressure
† IEC std. 60529; IP 68 is a user defined and results must be verified; product has not been specifically tested – passing is based on results from similar products
Assembly methods include: press fit, over-molding, compression seal, adhesive bonding or flange welding.
Numerous custom and standard options available. Please contact your local Porex sales representative to determine what is available.
Properties are typical and not meant for specifications.
RoHS, WEEE, and REACH Compliant (PFOA Free)
Sensor Housing Protection with Oxyphen Track-Etched Membranes
Oxyphen’s unique membranes offer distinct advantages over mechanical vents or physical openings, since intrusion of dust and moisture can be avoided and there are no moving parts that can stick or only work in one direction. Unlike competing track-etched technology, Oxyphen’s membranes will not have affinity to shrinkage or deformation and can withstand temperature fluctuations as well as exposure to most chemicals.
Electrolyte Reservoirs and Wicks
Reservoirs and wicks are needed to retain and deliver an electrochemical system’s electrolyte to facilitate the chemical reaction. POREX® fiber and foam media can be used for reservoirs, general wicking and supporting fluids within electronics and sensors.
Engineered for optimal capacity and directional flow, our electrolyte reservoirs and wicks minimize inhalation and skin hazards and meet your application specifications.
- Minimize inhalation and skin hazards – Made from safe-to-use PP or PE, our materials eliminate the need for glass wool, which can cause skin irritations and health issues when inhaled.
- Meet your application specifications – Product fluid retention, density and flow orientation can be tailored to meet your specific application needs.
Related Resources
Electrochemical Gas Sensor Components Brochure
Discover innovative porous polymer solutions and components to increase the performance of electrochemical gas sensors.
Improving Accuracy in Electrochemical Gas Sensors Case Study
See how our Porex engineering team developed a solution to address the challenges encountered in gas detection within industrial settings.
Secrets to Improving the Efficiency of Your Gas Sensors Webinar
Discover how to enhance gas sensor performance in our webinar. Learn to extend sensor lifespan, lower production costs, improve accuracy, and increase efficiency.
Porex LED Reflectors
Explore reflectivity media for LED reflectors. Learn more about how Porex Virtek PTFE membrane can maximize UV for disinfection applications with its outstanding UV reflectivity
Select Samples
Explore our most common functional sample library and see for yourself the possibilities of custom materials.
Ask an Engineer
The first step is a quick consultation with one of our experienced Application Engineers.