Radar Sensor Protection Vents

Innovative Track-Etched Membranes Offer Uniform Pressure Equalization & Protection

Filtration solutions
Venting solutions

Automotive radar systems are the primary sensors used in adaptive cruise control and considered a critical component of autonomous driving assistance systems (ADAS). In ADAS, the automotive radar sensor is an integral part of the various sensor systems that facilitate collision avoidance as well as pedestrian and cyclist detection. It also complements vision-based camera-sensing systems.

Radar sensors fulfill a very sensitive function within the automotive space, requiring membranes with highly defined and stable characteristics that can enable a uniform gas flow while, at the same time, protecting internal components from water, dust, dirt and other contaminants. OxyPad® and OxySeal® fluid repellent membrane solutions are the ideal fit for automotive radar systems as they can provide maximum protection against contaminants, reliably retain liquids, and also provide a gas exchange or pressure compensation in the event of overpressures. Because these membranes undergo a 100% quality control and are assembled with the greatest precision and smallest tolerances in pore sizes and pore densities, our customers can be assured of dependable operation from product to product.

Depending on the RADAR sensor application, our membranes can be attached via welding, gluing, clamping, or screwing/press-fitting of the membrane plugs.

Oxyphen track-etched membranes Radar Sensor Protection Vents
Oxyphen track-etched membranes Radar Sensor Protection Vents
Oxyphen track-etched membranes deliver excellent performance reliability and are the perfect solution for life-saving systems used in automotive applications.
  • 100% PFOA free small sized pressure compensation elements
  • Small tolerance range for reliable leakage tests for end of line (by air flow)
  • Precise membrane characteristics regarding air flow and water entry protection
  • Tunable protection level against water entry
  • Best chemical resistance performance
  • Injection molding (2K)
  • Punch and US welding
  • Cleanroom ISO class 7
  • Assembly
  • Packaging for OEM businesses

Available Material Formats:


  • Ø 8 / 4 mm
  • Ø 10/ 5.5 mm
  • Ø 11 / 3 mm
  • Ø 11 / 4 mm
  • Ø 14 / 8 mm


  • Ø 6.4 x 3.58mm

Material Recommendations by Application

Unique-Mem® Unlaminated Track-Etched Membranes:

  • PET

RoTrac® Laminated Track-Etched Membranes:

  • PET-Membrane/ PET-Nonwoven
  • PET-Membrane/ PP-Nonwoven

Alternative Indication:

  • PET Track-Etched unlaminated
  • PET Track-Etched laminated with PET/ PP non-woven as laminated support for higher robustness
Specification Unique-Mem® Track-Etched Membranes RoTrac® Track-Etched Membranes
Bandwidth (mm)
10, 13, 14.5, 20 & custom sizes
High Quality Raw Materials
PET – naturally slightly hydrophilic
PC – naturally slightly hydrophobic
PET-Membrane/ PET-Nonwoven –harder
PET-Membrane/ PP-Nonwoven – softer
Pore Size Ranges
0.1µm to 10µm
0.2µm to 3.0µm
Pore Density Ranges
105 to 109 pores per cm2
2×106 bis 3×108 pores per cm2
Thickness Ranges
8µm to 50µm
90µm to 220µm
Temperature Ranges
– 40°C and 160°C (for special application < 200°C)
– 40°C and 130°C (for special application < 160°C)
Air Flow Ranges
Up to 800 l / (bar cm2 min)
Up to 37 l / (bar cm2 min)
Hydrophilic Treatments
Various hydrophilic treatments increase water flow rate and wetting abilities of the membrane (example: PVP treatment)
Hydrophobic / Oleophobic Treatment:
Grade up to 7.5; AATCC TM 118
Salt spray resistance test2
According to IEC 60068-2-52, based on validation by the customer
Temperature resistance test1
In accordance with ISO 16750-4
Ice water shock test1&2
In accordance with ISO 16750-4
Climate resistance test
In accordance with ISO 16750-4
Chemical resistance test1
According LV124/ ISO 16750-5
IP Protection1
IP 64/65/66/67/68, according to DIN 40050

1 Testing in Progress

2 Based on Customer Validation

Highlighted Case Study

Advanced Driver Assistance System (ADAS) Venting

Advanced Driver Assistance System (ADAS) Venting

A manufacturer of automotive sensor components came to Oxyphen to develop and design a hydrophobic membrane venting solution specific to their automotive application that would provide protection, airflow to maintain adequate pressure compensation during normal operation, and be easy to assemble.

Related Resources

RADAR Sensors Application Brochure

Learn more about Oxyphen’s track-etched membranes that serve as a multi-purpose venting solution – providing the adequate pressure compensation, durability, protection, and accuracy needed for reliable sensor accuracy and performance.

EV Battery Safety Vents Application Brochure

Learn more about Oxyphen’s hydrophobic all-in-one solution that protects critical internal components from the ingress of liquid, dust, dirt, and other contaminants while also having the ability to burst at predefined overpressures to prevent potential explosions from taking place in the event of thermal runaway.

OxySeal® Product Brochure

Learn more about OxySeal® pressure compensation units that are designed to be a plug & play solution for easy integration into existing product assemblies while protecting from any environmental impact.

Register for our On-Demand Webinar

Delivering Precision & Control: An Introduction to Track-Etched Membrane Technology

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OxyPad Self-Adhesive Pads

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OxyDisc Die-Cut Membrane Discs

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OxySeal Pressure Compensation Units

OxySeal® Pressure Compensation Units

OxySeal® pressure compensated venting plugs, which are available with hydrophobic or oleophobic treated membranes, can prevent the ingress of liquid, water, dust, dirt, salt, and other contaminants.

Assemblies & Modules

Assemblies & Modules

To meet specific product solution requirements within the life-science and automotive spaces, Oxyphen partner with leading OEMs to develop highly tailored components and assemblies for specific applications. 

customized solutions

Customized Solutions

Oxyphen consists of a team of scientists, problem solvers, engineers, and strategic thinkers who are passionate about creating high-value solutions that bring customer’s product designs or concepts to life.

Membrane Technologies Available

Unique-Mem track-etched membranes


Unique-Mem® Unlaminated Track-Etched Membranes

Unique-Mem® track-etched membranes, available as hydrophilic or hydrophobic, are characterized by cylindrical shaped pores penetrating the membrane in different angles. They have a smooth flat surface and well-defined flow rates.

RoTrack Track-etched Membrane


RoTrac® Laminated Track-Etched Membranes

RoTrac® track-etched membranes are Unique-Mem® membranes that are supported with non-wovens (PP or PET) to create a more robust membrane. They are available as either hydrophilic or hydrophobic membranes.

Fiber-Based track-etched membranes


Fiber-Based Membranes

Fiber-based membranes are surface modified using a super-hydrophobic coating to repel water and other liquids while still allowing maximum airflow.

Contact Us

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