How to verify the protection performance of Sensor ePTFE Vents

1. Water and Dust Ingress Testing

IP6X (Dust Tight): Test with talcum powder or fine dust in a vacuum chamber to ensure no particles penetrate the vent or sensor enclosure.
IPX5/IPX7/IPX9K (Water Resistance):
- IPX5: Simulate low-pressure water jets (12.5 mm nozzle, 12.5 L/min for 15 minutes).
- IPX7: Submerge the vented assembly in water (1 m depth for 30 minutes).
- IPX9K: High-temperature, high-pressure water jets (80–100°C, 80 MPa).

Method: Place a moisture indicator or conductive sensor inside the enclosure. After testing, inspect for water/dust intrusion or electrical faults.

2. Pressure and Thermal Cycle Testing

Pressure Equalization Test: Apply a pressure differential (e.g., ±5 kPa) across the vent and measure equalization time (should balance within seconds).
Thermal Cycling: Subject to repeated temperature cycles (-40°C to 85°C). Check for delamination, cracking, or performance degradation.

3. Chemical and Environmental Resistance

Chemical Exposure: Immerse in fluids (oil, saltwater, solvents) for 24–48 hours. Evaluate swelling, degradation, or porosity loss.
UV and Aging Tests: Expose to UV radiation (Xenon arc lamp, 500+ hours). Inspect for brittleness or reduced breathability.

4. Particle Filtration Efficiency

Filtration Rating Test: Use standardized aerosol (0.3 μm NaCl particles). ePTFE vents typically block ≥99% particles (HEPA-level).
Flow Rate vs. Filtration: Measure airflow velocity at specified pressure drop to verify breathability-filtration balance.

5. Long-Term Durability

Endurance Testing: 10,000+ pressure cycles or 1,000+ hours in high humidity. Monitor performance decline.
Real-World Simulation: Install in prototype sensors and test in target environments (automotive underhood, marine sites).

6. Compliance with Standards

ISO 20653 (automotive environmental protection)
IEC 60529 (IP rating specifications)
ASTM D6701 (chemical resistance of plastics)
MIL-STD-810G (military environmental testing)

Sensor ePTFE Vents Qualification

6. Compliance with Standards