GORE™ Protective Vents for Sensors

Vents equalize pressure to improve sensor performance

Electronic sensors are becoming smaller with more demanding requirements. GORE® Protective Vents improve reliability and performance in liquid and gas sensors.

Advances in technology allow smaller and more versatile sensors to be used in applications that were not previously possible. Sensors are used in harsh environments, which can quickly decrease reliability, including detecting hazardous gases in industrial process lines, dissolved oxygen in streams and pH sensors and liquid level sensors in beverage plants. High-pressure sprays during cleaning cycles drastically cool down the sensor housing and cause an internal vacuum of 200 mbar (3 PSI) or more.

To equalize this vacuum, air and moisture are drawn into the sensor, causing condensation to form, which can affect the measurement accuracy and sensor reliability. Another issue is the cleanliness of the surrounding air. Sensors are used in warehouses, manufacturing and outside areas. Exposure to contaminants decreases the accuracy and functionality of the sensor.

Venting for condensation protection

Installing GORE® Protective Vents eliminates the negative effects of pressure differentials and fluctuating temperatures. Membrane vents continuously equalize pressure and eliminate the vacuum that draws in air and moisture. Vents also provide a barrier against harsh environmental conditions such as driving rain, dust and dirt.

GORE® Protective Vents protect sensors using expanded polytetrafluoroethylene (ePTFE) membranes. The ePTFE membrane allows air and gases to flow freely in and out of the sensor, providing equal pressure at all times. This free flow of gases also enables short response times because gases can immediately pass through the membrane, preventing inaccuracy and delays in measurement results.

The naturally hydrophobic and oleophobic GORE® Membranes repel water and other contaminants, meaning the sensor is not compromised by potentially harmful contaminant materials or liquids.

Vents can extend sensor life. Read about vent case studies for more information.