Good morning,
We got a few hardwired older sensor style systems. Same issues so I looked
for options.
Recently we’ve starting trying the PureAire (TX-1100-DRA) which is
supposed to last 10+ years between sensor changes and zero maintenance.
A couple years in and no complaints. They cost more upfront, but no false
alarms at 2am every 18 months is worth the cost so far.
Just had one of our older “cheaper” systems need a sensor.
The sensors have now rocketed up to over $400 and the calibration by an outside
firm cost $300 (admittedly we can do this ourselves subsequently…but still…wow).
So only just thinking about a $400 sensor (not costing in initial device) every
2 years (being generous) over a 10yr system it costs more in sensors than the newer
10yr system costs upfront…. (Supply chain/inflation may have altered that
initial cost though).
Best wishes,
Ryan
----------------------------------------------------------
Ryan McKay, PhD
NMR Facility Manager
(he/him)
University of Alberta
College of Natural and Applied Sciences - Faculty of Science
Department of Chemistry
Shipping Address
Co: Ryan McKay Room E3-17A East Chem. Bld.
Central Receiving
University of Alberta
116 Street and 85th Avenue
Edmonton, Alberta, Canada
T6G 2R3
Office 780.492.9950
Mobile 780.920.8871
URL uab.ca/nmr
Email ryan.mckay_at_ualberta.ca

The University of Alberta respectfully acknowledges that we are situated on
Treaty 6 territory, traditional lands of First Nations and Métis people.
> On Aug 7, 2023, at 1:11 PM, Sarah Cady <sdcady_at_iastate.edu> wrote:
>
> 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 - 08:05:09 MST