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Transition to new Charcoal Media

In November 2017, Assay Technology announced we would begin transitioning to a new charcoal media for all of our charcoal based badges.   This change was made necessary because the manufacturer of the carbon material we have used for the last 10 years or so, decided they would no longer produce the carbon/PTFE material.  Knowing that people do not like change in the Industrial Hygiene arena, all avenues were exhausted, but they refused to manufacture any more.

We performed a search for another company that could provide an equivalent product, however, the high ratio of carbon to PTFE proved to be too challenging for company after company.  After a few years of searching, we found and entered into a contract with an expert in the field.  Together, a process was developed to generate an equivalent material right in the Assay Technology facility in California.  Representative background, sampling rates, and desorption efficiencies (at mid level values) were all evaluated.  The sampling rates were unchanged.  The backgrounds were similar as were the desorption efficiencies.  While the tests have shone the old and new charcoal to be equivalent in most ways, some labs and end users have expressed interest in knowing when products containing the charcoal media will switch over to the new charcoal.

Status as of February 14th 2018 is listed below.

 

Badge Description  Product Status
525AT Organic Vapor TraceAir II M525AT In Stock with new charcoal
N525AT On Hold pending background investigation.
X525-1AT 1 Box 521 / 30 Boxes 525-1  (First 525 Lot:1G18)
X525-4AT 5 Boxes 521 / 42 Boxes of 525-4 (First 525 Lot:  12B17
X525-25AT 2 Boxes 521-25 / 34 Boxes of 12B17
All 521s have the old charcoal media.  All 525s have new media.
566AT Organic Vapor, Most Versatile M566 Both old and new charcoal available.  (Last Lot Old Media: 11C17)
N566AT In Stock with old charcoal until ~March ’18
X566-1AT In Stock with old charcoal until ~March ’18
X566-4AT In Stock with old charcoal until ~March ’18
546AT Organic Vapor, High Capacity M566 (Same wafer as 566) Both old and new charcoal available.  (Last Lot Old Media: 11C17)
N546 In Stock with new charcoal, 11B17
X546-1AT In Stock with old charcoal until ~March ’18
X546-4AT In Stock with old charcoal until ~March ’18
555AT Ethylene Oxide X555AT First lot with new charcoal, 1R18, but badges with old media in stock.
574AT Anesthetic Gases X574AT First lot with new charcoal, 1A18, but badges with old media in stock.

*Dates for in stock inventory are subject to change