Hi everyone,
Thank you all so much for your responses. I am happy to know it is a closed
loop system; I just wanted to make sure what all the added expenses are you
have to deal with in order to benefit from the probe technology itself. A few
things I should have included in the original email:
1. I would likely keep the LHe cryoprobe installed and not do probe switches
in that instrument. Goal is to acquire a second instrument, and hopefully have
a Prodigy probe installed on one that could then be used for switching to other
probes based on user needs, and one instrument to run LHe cryoprobe exclusively.
2. I am hoping to install the LHe onto a Bruker 400 MHz Avance.
How robust are the probes themselves? In addition to the added coldhead/regular
maintenance expenses, how often have you had the probe go down/require additional
Bruker visits/had to send the probe in for repairs?
Thanks again everyone!
Jessica
Dr. Jessica M. Roberts, Ph.D.
Assistant Professor of Instruction
NMR Facility Manager
Department of Chemistry and Biochemistry
Ohio University
245 Chemistry
Athens, OH 45701
740.593.0038
jroberts_at_ohio.edu<mailto:jroberts_at_ohio.edu>
--
> From: main_at_ammrl.groups.io <main_at_ammrl.groups.io> on behalf of Clemens Anklin via groups.io <clemens.anklin=bruker.com_at_groups.io>
> Date: Thursday, August 31, 2023 at 7:07 AM
> To: main_at_ammrl.groups.io <main_at_ammrl.groups.io>
> Subject: [External] Re: [AMMRL] Question about LHe cryoprobe costs/He recovery
Dear Jessica,
Helium cryoprobes do not use liquid helium at all. They work with a closed
loop helium compressor and cooling system. You will need high purity ( 6 nines)
Helium gas for installation and operation. Consumption depends on how often
you remove and reinstall the probe. The recurring cost with a cryoprobe is
the periodic maintenance of the coldhead.
With best regards
Clemens
On 8/30/2023 8:48 PM, Roberts, Jessica wrote:
Hi everyone,
I am in the process of determining the most appropriate cryoprobe to purchase
and one of the major driving forces is that of the operation/upkeep costs. I
have a handful of biochemical users, as well as other advanced organic
users, that would greatly benefit from a LHe cryoprobe and personally that
is my preference. However, I was curious to see a few things from others that
would help navigate this decision:
1. What are the yearly costs related to the upkeep of the LHe cryoprobe?
If the cost can be broken down to compare between general upkeep and He costs,
that would be super helpful!
2. I know that is going to depend on usage and operation temperatures, etc.,
but how much LHe do you feel your probe goes through yearly?
3. Is there a way to recover the He boil off from the probe? I am in
the process of installing a He recovery hose to the NMR He stack already, not
sure how that would work to recover from probe (I apologize if this is a silly
question).
Thanks!!!
Jessica
Dr. Jessica M. Roberts, Ph.D.
Assistant Professor of Instruction
NMR Facility Manager
Department of Chemistry and Biochemistry
Ohio University
245 Chemistry
Athens, OH 45701
740.593.0038
jroberts_at_ohio.edu<mailto:jroberts_at_ohio.edu>
--
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Received on Thu Aug 31 2023 - 04:15:39 MST