Testing and Replacing Chemisorbant Media

Keeping units serviced with high-performance chemisorbant media is a very important part of system maintenance. If the media is not changed out when it is due for replacement, the unit will not function properly and unwanted gases will be released into the environment. The life span of media will vary depending on many factors, such as type and quantity of gas, airflow, etc., but generally lasts from 1 to 3 years depending on media quantity and chemical load. There are multiple ways to test and see if the media is reaching its expiration date:

1. LIFEGARD™ Media Bed Monitor – The LIFEGARD™ offers enhanced continuous, real-time monitoring with an advanced electronic notification system that simplifies maintenance scheduling and enhances operational efficiency. Equipped with externally wired and mounted sensors, the monitor detects variations in chemisorbant media, enabling precise forecasting of media consumption.
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_{Copyright ©2025 by PureAir® Filtration; All Rights Reserved. LIFEGARD™ is a trademark owned by PureAir® Filtration. The LIFEGARD™ media bed monitor is protected by US Patent 12,312,548 issued to PureAir® Filtration May 27, 2025 by US Patent Office}

2. Media Bed Indicator – Most deep bed scrubbers have a silver media bed indicator inserted into its bed. The indicator measures the penetration of corrosive H2S gases into the media bed along the line of air flow. As the media bed deteriorates it tarnishes the indicator and turns it black. Pull out the indicator to see where the furthest end of the indicator is being corroded. When the corrosion travels past the middle of the indicator, it is time to replace the media and ensure the system’s proper functioning.

3. Media Testing – Free media testing is offered to all PureAir® customers. This testing requires collecting two cups of media from the system. For deep bed scrubbers, we recommend extracting media from each media sample port (top, middle, and bottom). Place the media samples in sealable bags, label, and mail in for media life analysis. As soon as the media is received, it is tested and a lab report analyzing the lifetime value of the media is returned. Sample media testing for shown at right/below. Click here to print media shipping labels, 6 per sheet.

4. Corrosivity Test Kit – A test kit consists of a strip of silver and copper that is hung in the applicable room for 30 days. The test kit is then sent back to our in-house lab to determine which type of gases caused the corrosion, and in what quantities. From there, PureAir will recommend a solution to remove the appropriate gases from the room. PureAir’s Environment Corrosivity Monitor (ECMv2) offers live, accurate results including detection of air quality rating from corrosive gases in the environment without lab testing. Click here to print media shipping labels, 6 per sheet.