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Subject: [DCHAS-L] EPA Bans All Retail Distribution of Methylene Chloride to Consumers for Paint and Coating Removal
Date: Friday, November 22, 2019 at 1:58:27 PM
Author: DCHAS Membership Chair <membership**At_Symbol_Here**DCHAS.ORG> 		Next by Date:
Subject: [DCHAS-L] Chemical Safety headlines (21 articles)
Date: Mon, 25 Nov 2019 07:32:36 -0500
Author: DCHAS Membership Chair

From: Bruce Van Scoy <bvanscoy**At_Symbol_Here**TWC.COM>
Subject: [DCHAS-L] CO2 Monitoring in Ultra-Cold Freezer
Date: Fri, 22 Nov 2019 18:23:21 -0500
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 005f01d5a18b$d66f6b90$834e42b0$**At_Symbol_Here**twc.com


Fellow Listers,

I’m wondering if anyone could provide some experience, guidance and incite into the following situation.  I have personnel working in ultra-cold freezers selecting/packing materials into boxes filled with dry ice.  A controller was installed to monitor temperature and CO2 levels with sensors installed.  I am concerned with the CO2 sensor specification in this environment, specifically concerning precision, accuracy and ability to calibrate to respond within an ultracold freezer.  Does anyone have any experience with similar CO2 sensors in this environment? 

Please respond off-line and thank you!

Bruce

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