Hi Sarah;
We have just replaced our old ones with Honeywell E3SA (P/N 1309A0042) which
can be tied into remote network. They are hard wired in, but the sensors are
easy to replace. Except for a bad batch of sensors, they seem to work reliably.
If you have questions, I can set you with the person in Environmental Health &
Safety who is in charge of them.
--Cathy
Catherine F. M. Clewett, Ph.D.
Spectroscopist, Magnetic Resonance Facility
University of Wisconsin Madison, Department of Chemistry
1101 University Ave Room 2201c, Madison, WI 53706
clewett_at_wisc.edu<mailto:clewett_at_wisc.edu>, (608)262-8196,
https://pbcic.chem.wisc.edu
From: main_at_ammrl.groups.io <main_at_ammrl.groups.io> On Behalf Of Harker,Robert A
Sent: Tuesday, August 8, 2023 10:34 AM
To: main_at_ammrl.groups.io
Subject: Re: [AMMRL] Oxygen sensor/monitor for NMR lab #Troubleshooting
Sarah;
We use the Pureair systems with 10 year sensors too. There are some drawbacks
though:
They are not hardwired into AC mains of the facility. They use a little power
supply plugged into an AC power outlet which can add clutter. If you have or
have access to someone with soldering skills, the power supply cable lengths
can be modified without recalibration.
The sensor is mounted on a length of cable which can not be extended without
recalibration but you can order them to length. We did not, so we were limited
with sensor placement.
They were expensive.
Good luck,
Robert Harker
Engineer
University of Florida
Dept. of Chemistry
Center for Nuclear Magnetic Resonance Spectroscopy
https://nmr.chem.ufl.edu/
125 Buckman Drive
M/S 82
box 117200
Gainesville, Florida 32611-7200
cell: 352-328-5862
Ph. 352-392-4650
From: main_at_ammrl.groups.io<mailto:main_at_ammrl.groups.io> <main_at_ammrl.groups.io<mailto:main_at_ammrl.groups.io>> On Behalf Of Sarah Cady via groups.io
Sent: Monday, August 7, 2023 3:11 PM
To: main_at_ammrl.groups.io<mailto:main_at_ammrl.groups.io>
Subject: [AMMRL] Oxygen sensor/monitor for NMR lab #Troubleshooting
Hi all,
I need to replace the oxygen sensor in my lab. The one I have is GFG ZD21
https://www.gfgsafety.com/us-en/products/fixed-gas-detection-systems-transmitter/zd21
and I have found that the sensors don't last very long and replacement
ones are very difficult to calibrate. Right now it is hard-wired in the wall
with a sensor at the ceiling and the floor. I don't really care too much about
having two sensors/channels with a replacement unit, but I have existing conduit
to run two sensors.
Would be interested in hearing what oxygen monitors you use in your labs/facilities.
I'd also be interested in a remote monitoring option if it isn't a zillion dollars.
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Received on Tue Aug 08 2023 - 08:45:35 MST