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.
|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