Liquid and Gas Sensors

Ensure accuracy and reliability for consistent performance

From detecting hazardous gases in an industrial process line or dissolved oxygen in streams, to pH sensors and liquid level sensors in a beverage plant, electronic sensors are becoming smaller with more demanding requirements. Advances in technology allow smaller and more versatile sensors to be used in applications that were not previously possible. These advances have resulted in the sensors being used in extremely harsh environments, which can quickly decrease reliability. For example, high-pressure sprays during cleaning cycles can 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.

Another issue in these environments is the cleanliness of the surrounding air. Sensors are used in environments that include warehouses and manufacturing as well as outside areas. Exposure to contaminants decreases the accuracy and functionality of the sensor.

Venting for Protection

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

GORE™ Protective Vents protect sensors because of the proprietary expanded polytetrafluoroethylene (ePTFE) membrane from Gore. 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™ Membrane repels water and other contaminants, which means that the sensor is not compromised by potentially harmful materials and liquids. The result