Gas absorption
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Overcoming Challenges with Harmful Lead Acetate Filters

Audience:   Engineers and product managers of electrochemical gas sensors who currently use absorption filters containing harmful lead acetate

Summary:

The lifespan of an electrochemical gas sensor and its ability to detect problematic gases can be negatively impacted by an environment where interfering gases – such as H2S, SO2, HDMS and volatile organic compounds – are present.  Gas absorption filters act as a gatekeeper between the interfering gases and the target gases of the sensor, enabling the target gas to reach the electrode and be identified.  An interfering gas can decrease sensor performance over time and can trigger the sensor incorrectly.  To safeguard the electrode from these interfering gases, manufacturers often use filters with lead acetate; however, lead acetate not only poses a threat to workers in direct contact but also can result in poor sensor performance over time.   In this tech brief, learn how porous polymers can be used in absorption filters instead of lead acetate to make them safer for the environment and workers – and to enhance the sensor’s performance and lifespan. 

What registrants will learn in this tech brief:

  • Understand how gas absorption filters work and their role in the overall performance of the sensor – and how lead acetate is typically used
  • Learn why companies are moving away from using components that have lead as an active ingredient
  • Discover how to remove lead entirely from a sensor to align with lead-free manufacturing practices by using porous polymers instead

See the data that illustrates the performance improvements that porous polymers can make in the sensor in addition to being lead-free

Tech Brief Gas Absortive

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