Hello Everyone, Many thanks for sharing your experiences with this and directing me to the literature. It’s incredibly useful and gives me somewhere to start with this.
Thanks, Amy. From: pestlist@googlegroups.com <pestlist@googlegroups.com> On Behalf Of Breitung, Eric Sent: 03 September 2020 21:30 To: pestlist@googlegroups.com Subject: RE: [External] - Re: [PestList] Re: Anoxic treatment EXTERNAL: This email originates from outside of The National Archives. If you are interested in having your sensor(s) validated using NIST gases, etc., I can likely do this as private work for a fairly nominal fee. Feel free to reach out to me at Breitung1 at yahoo dot com If this is something you might be interested in, let me now, and I can come up with a process and cost structure based on how many sensors might be testable at one time. Eric Breitung From: pestlist@googlegroups.com<mailto:pestlist@googlegroups.com> <pestlist@googlegroups.com<mailto:pestlist@googlegroups.com>> On Behalf Of Todd Holmberg Sent: Thursday, September 03, 2020 2:13 PM To: pestlist@googlegroups.com<mailto:pestlist@googlegroups.com> Subject: [External] - Re: [PestList] Re: Anoxic treatment Amy- We purchased one of these for our anoxic treatments. Previous to the AnoxiBug system, we used the "Ageless-eye" pink/purple pills. The red/green light on the Anoxibug system gives a much more clear and confident "yes vs no" relative to the Ageless-eyes purple/pink pill- which made us super excited. However, as others have mentioned on this thread, exactly when that light switches might be a little questionable. One of the big questions we have is: when should people replace the sensor? Given the nature of how tight the window needs to be for low oxygen for treatments to be effective, it seems like there isn't much margin for error for sensors to be off- even by just 0.1%. When ordering a new sensor, should you just by one off Amazon?- I remember looking around Hanwell's website a while back, and I couldn't find a way to order just the replacement sensor (40XV CiTiceL). My understanding is these sensors break down somewhat as they sit on the shelf even when kept in their original "blister pack", so when ordering one off Amazon for example, how does one know that sensor hasn't been sitting in a warehouse for a year... or 10? (maybe there is a date stamped on it somewhere- I'm not sure- I haven't tried ordering one yet) When institutions order these AnoxiBug units, is there an understanding that they should plan on ordering new replacement sensors every 1-2 years just to be safe?- kind of the same mentality as giving cars routine oil changes? Given the nature of the precision required for confident anoxic treatments, I wish Hanwell offered a program where you could send them in every year or two to have them confirmed as accurate. Otherwise, being realistic, how are institutions supposed to feel 100% confident that the red-to-green light actually means 0.2%? I would gladly pay shipping/handling- even with a "service charge" of some sort for the peace of mind knowing that "green light means effective treatment in progress". -Just out of curiosity, does anyone know what kind of businesses might offer accuracy testing using "NIST certified tanks of calibrant gas" as mentioned in the study? -I'm not even sure what to Google for that one... I have heard people mention that certain insects are more "durable" than others, and can be harder to kill in treatments. Of the insects that are considered "easier to kill", might the Anoxibug unit still be useful in giving an accurate indication of an "effective treatment in progress"- even if the green light might be indicating ~5%-1.2% as mentioned in the study? Thanks for putting that study together- very interesting! Thanks, Todd On Wed, Sep 2, 2020 at 8:23 AM rachaelarenstein <rachaelarenst...@gmail.com<mailto:rachaelarenst...@gmail.com>> wrote: 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 rach...@amartconservation.com<mailto:rach...@amartconservation.com> 917-796-1764 On Wednesday, September 2, 2020 at 8:44:30 AM UTC-4 dj...@cornell.edu<mailto:dj...@cornell.edu> 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 dj...@cornell.edu<mailto:dj...@cornell.edu> From: 'Sampson, Amy' via MuseumPests <pest...@googlegroups.com<mailto:pest...@googlegroups.com>> Sent: Wednesday, September 2, 2020 6:23 AM To: pest...@googlegroups.com<mailto:pest...@googlegroups.com> 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. 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