[labnetwork] Midas Cl2 detections

[Shimon Eliav]

Hi Dan,

We experienced a similar situation: two or three times our Cl2 detector (Dragger) installed at the gas cabinet in our Gas Pad showed around 1TLV for a minute. The last time it happened we solved the mystery: a constructor parked his big diesel van very close to the door of our Gas Pad. By the end of the day he entered his car, started it and went away. The smoke from the car escape was sucked into the Gas Pad (under exhaustion) and triggered the detector.
These detectors can be triggered by a quite large list of gases. Some of them Sulfur compounds, present in Diesel combustion.

I can't say this is your case, but that was what happened to us.

Regards,

Shimon
The Unit for Nano Fabrication
The Hebrew University of Jerusalem
Israel

From: labnetwork-bounces at mtl.mit.edu [mailto:labnetwork-bounces at mtl.mit.edu] On Behalf Of Pulver, Daniel - 0835 - MITLL
Sent: Thursday, 18 June 2020 19:25
To: labnetwork at mtl.mit.edu
Cc: Eastwood, Scott - 0835 - MITLL <Scott.Eastwood at ll.mit.edu>
Subject: [labnetwork] Midas Cl2 detections

Labnetwork:

We have been having issues with our Honeywell Midas CL2 detectors in one of our research labs. On 3 different occasions we have seen a detection of approx. ½-1 TLV (.25-.5PPM) for <1 minute duration. In all 3 cases we have done investigations without finding the root cause. We are starting to wonder if it is the sensors themselves? All 3 were replaced at about the same time (Jan/Feb 2020).

Has anyone else been having issues with these devices?

Thanks,

Dan


Dan Pulver
Microelectronics Laboratory Manager
MIT Lincoln Laboratory
781-981-1716  office
daniel.pulver at ll.mit.edu<mailto:michelle.simoes at ll.mit.edu>



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mtl.mit.edu/pipermail/labnetwork/attachments/20200619/13512475/attachment.html>