Regarding the Anoxibug and other sensors that were tested by me and Gabrielle at the Met, please note that we only tested what we had on hand. 1 or 2 of each type of sensor. The article should not be read as a condemnation of those sensors, rather, it is a *major caution* to all of us that we need to validate our sensors before using them. I have the supplies to do this in NYC and list them in the paper. If you would like assistance with your sensor or that process, feel free to reach out to me.
It would be interesting and useful to see if you, with your particular sensors, purchased on a particular date, calibrated on a particular date, etc., follow the results from my tests or not. Please post your results to the list! -- Eric Breitung Research Scientist Department of Scientific Research 212 396 5390 The Metropolitan Museum of Art 1000 Fifth Avenue New York, NY 10028 @metmuseum<https://www.instagram.com/metmuseum> metmuseum.org<http://www.metmuseum.org/> From: [email protected] <[email protected]> On Behalf Of rachaelarenstein Sent: Wednesday, September 2, 2020 9:23 AM To: MuseumPests <[email protected]> Subject: [External] - [PestList] Re: Anoxic treatment Dear Amy, I have used the Anoxibug setup on multiple treatments. I have found their large pre-made chambers ( e.g. 3 meters cubed and 5 meters cubed) to be well constructed and for these large sizes it was more efficient than making them myself. The barrier film is robust enough that if the chambers are treated carefully they can be reused (although they are obviously a bit smaller each time!). The scavenger composition is supposedly similar to others in its mixture of iron filings with a metal halide catalyst, supposedly sodium chloride. For large scale treatments the scavenger is more economical than ageless, which I use for smaller chambers. The Anoxibug sensor was a major feature of the system and that is where the recent research by Eric Breitung at the MET and Gabrielle Crowther have demonstrated that there is a issue. You can read their article on MuseumPests.net linked from the homepage, solutions page or the blog https://museumpests.net/posts/ The meter is supposed to provide a straightforward indication when you have reached the necessary 0.3% low oxygen environment. It purportedly should switch from flashing red to flashing green at 0.2%. The recent testing showed that it starts flashing green at a significantly higher percentage meaning that it does not provide an accurate picture of what is going on in the chamber and can lead to a false sense of security. This problem is similar to what we have seen previously with the ageless eye not being accurate. That would cause me to call into question whether my previous treatments were effective but it is easy to know that you have the right amount of scavenger to ensure a successful treatment and I generally had a bio assay (i.e. live adult insects) in the chamber and those were dead upon completion of treatment. I have not had any projects that have required re-treatment. The other note is that I, and others, have found that there is a substantial spike in RH that remains high even after the system has supposedly stabilized. This can be controlled though with an appropriate amount of desiccant. I also recommend Kristie Short-Traxler and Alexandra Walker's paper on their use of the Anoxibug system at the Bodleian Library available on the Conferences > MuseumPests 2014 Conference Session > Treatment & Remediation page. https://museumpests.net/conferences/museumpests-2014-conference/museumpests-2014-treatment-remediation/ I have been in contact with Hanwell representatives to make them aware of the recent testing and my loss of confidence in the units. They offered for me to send them back for examination. I will provide an update when there is further information. Until then I would consider using the envelopes/cubes and the scavenger but with a different oxygen meter. You are welcome to contact me off-list with further questions. Best, Rachael Perkins Arenstein Principal, A.M. Art Conservation, LLC andMuseumPests.net Co-Chair [email protected] 917-796-1764 On Wednesday, September 2, 2020 at 8:44:30 AM UTC-4 [email protected] wrote: And does anyone know what the “oxygen scavenger” used actually is? Dan Wixted Pesticide Management Education Program (PMEP) Cornell University Ph (607) 255-7525<tel:(607)%20255-7525> 525 Tower Road FAX (607) 255-3075<tel:(607)%20255-3075> CALS Surge Facility psep.cce.cornell.edu<http://psep.cce.cornell.edu/> Ithaca, NY 14853 [email protected] From: 'Sampson, Amy' via MuseumPests <[email protected]> Sent: Wednesday, September 2, 2020 6:23 AM To: [email protected] Subject: [PestList] Anoxic treatment Hello Everyone, I am investigating large-scale pest treatments and came across this: https://hanwell.com/anoxibug-insect-pest-control/ I would be really interested to hear if anyone has used Anoxibug (or similar) and what your experience of it was? Was it fully effective? Was it easy to use? All thoughts gratefully received. Many Thanks, Amy. [Image removed by sender. Image removed by sender. The National Archives logo] Amy Sampson | Associate Preventive Conservator T: 020 3908 2435 | W: nationalarchives.gov.uk<http://www.nationalarchives.gov.uk/> Twitter: @UkNatArchives The National Archives, Kew, Richmond, Surrey TW9 4DU Please don't print this e-mail unless you really need to. ----------------------------------------------------------------------------------- National Archives Disclaimer This email and any files transmitted with it are intended solely for the use of the individual(s) to whom they are addressed. If you are not the intended recipient and have received this email in error, please notify the sender and delete the email. 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