PE Autosystems XL sub ambient

[GeorgeDCarr]

Beautiful machine.
However I would like to go sub ambient.
The machine has the fittings for CO2 I understand.
However it locks up when I couple a 1000psi CO2 dip tube cylinder.
The handbook claims it needs a dip tube CO2 cylinder running at 75-85psi.

Anybody have any ideas as how to achieve this?

[chromatographer1]

Speak to your supplier of CO2 and ask them what hardware they have to achieve your goal.

Some sort of heated dual stop regulator would be my guess.

Certainly a call to Perkin Elmer could not hurt.

best wishes,

Rod

[GeorgeDCarr]

Thanks for the reply.
I started off with the local PE guys.

Fascinating, asked the local AP and sure enough there is a low pressure Dewar type system for CO2. I had not come across it. Always used the 1000psi dip tube cylinders because of the convenience.

We are tropical, anything below 40C takes time.