From: Luis A Samaniego <l-samaniego**At_Symbol_Here**NORTHWESTERN.EDU>
Subject: [DCHAS-L] Industrial hygiene monitoring instrumentation
Date: Thu, 6 Dec 2018 23:26:14 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: e7ca7bef73134b958598ff23aa6e3059**At_Symbol_Here**

The MIRAN Sapphire is an instrument to monitor gas / vapor exposure in real time. Manufactured by Thermo Scientific. Unfortunately, this instrument is going to be discontinued and service support will cease in the future. I am looking into the Gasmet DX 4040 portable chemical gas analyzer to replace the MIRAN. Does anybody have the Gasmet DX4040 in operation? Please provide feedback. How reliable is this instrument? Are there any other portable instruments to detect hazardous vapors in real time such as formaldehyde, isoflurane, xylene, benzene, phenol vapors, VOC in general? Any suggestions are appreciated. Draeger test tubes, diffusion badges are great but the accuracy is (+/-) 25%

Thanks in advance,



Luis Samaniego, CSP

Sr Laboratory Safety Specialist


Northwestern University

Research – Safety

303 East Chicago Avenue

Ward B-106, W223

Chicago, IL 60611








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