[labnetwork] ambient gas detection for bulkheaded tools

[Paolini, Steven]

We here at Harvard use ambient points in the bays as well as points within the gas network of all bulkheaded tools that use toxic/ flammable gases. We monitor the bay side by installing bored through 3/8" Swagelok bulkhead unions through the wall panel and push the 1/4" Teflon "sniffers" about 6" into the bay side. Placement of the sniffers is a combination of where the chambers and people are.  We have very fast response from our detection due to good placement, an engineer here (OK, it's me) has accidently set them off while forgetting to disarm them before opening a chamber. As embarrassing as these evacuations are, they are proof positive that the system is protecting the occupants of the lab.

Steve Paolini
Harvard University Center for Nanoscale Systems
spaolini at cns.fas.harvard.edu

-----Original Message-----
From: labnetwork-bounces at mtl.mit.edu [mailto:labnetwork-bounces at mtl.mit.edu] On Behalf Of Iulian Codreanu
Sent: Wednesday, June 19, 2013 12:53 PM
To: Fab Network
Subject: [labnetwork] ambient gas detection for bulkheaded tools

Dear Colleagues,

I am trying to figure out how the handle the detection of hazardous gases in the ambient when part of the tool is in the chase and part in the bay.  The connection between the tool and the line(s) carrying the
gas(es) would be in the chase so it would make sense to monitor that area.  What are your thoughts on providing detectors on the bay side of the wall as well?

Thank you very much for your help.

Iulian

--
iulian Codreanu, Ph.D.
Director of Operations, UD Nanofab
149 Evans Hall
Newark, DE 19716
302-831-2784


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