CHEMISTRY Cryogenics Systems Status.

This is information that I believe is true and current. It is not intended to be policy or the final word of or for the Department of Physics. I hope you find it useful.

Helium Level Detectors:

Helium level detectors have been added to all of the transport dewars.  Please read the information and instructions for using them. They MUST be plugged in to the "Cryonet" in order to keeep their batteries charged. If you will have one in the lab for more than a day you should use the supplied HLD charger available in CLB 308 if you don't have a cryonet connection.
The liquid helium transport dewars that are stored in CLB 308 are now actively read hourly on the hour by the "Cryonet." This means that you can now monitor dewar deliveries and save yourself some time. From any computer with web access, you can view the liquid levels of each dewar in CLB 308 and each has a time stamp for when the level was read. So, if you are waiting for a dewar to be delivered, check the data just after the top of each hour, and if the dewar you were assigned has a current time stamp and has enough helium in it, it is ready for you to go get it. This will also allow us in the Cryogenics facility to know when you are done with it. Please remember to always plug in the recovery hose and the Cryonet connector so that this sytem can work for all of us. Try it now.

Helium Recovery:

We are collecting all recovered gas at the NPB. Chemistry is using a low pressure gas transfer system located in CLB308. Recovered gas from Chemistry is metered and collected into a recovery balloon. Low pressure compressors compress the gas just enough to send it down the pipe to Williamson. There, it is metered, collected and retransfered in the same manner on to the NPB. The whole system is automated and remotely monitored. A smaller but similar system is in place in Leigh Hall for the lab there.

Liquid Helium:

The dewar storage area is CLB308. Requests for helium should be by phone, web or e-mail. Please return unused dewars to room CLB308 as soon as you are done with them, empty or not. The PSI liquefaction equipment is in the NPB. We have a truck for transporting dewars to and from Chemistry.


Each lab has a gas meter and a remote counter and a cryonet box. The cryonet reads the recovered helium volume, records it to be automatically sent to the NPB for inventorying each workday.

This webpage is administered by the
Cryogenic Services at the University of Florida in the Department of Physics
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