Magnets wound from NbTi or Nb3Sn may be conduction-cooled and operate in vacuum without the need of liquid helium(e.g., “cryogen-free”). Cryogen free systems can replace most conventional liquid helium cooled magnet systems if a compact system is required, or if liquid helium is undesirable or unavailable.Current leads constructed with HTS material allow the system to be cooled using either a G-M or Pulse Tube type cryocooler.

Source: http://www.americanmagnetics.com/cryofree.php

Have a look at Blue Fors dry cryostats. 

http://www.bluefors.com

We use a HelioxVL for fast measurements.

-base temperature 300mK

-supplemented with a self-made solenoid for 2T

-easy if use and fix

We use a BF-LD250 for long measurements.

-base temperature 20mk

-can be equipped with a magnet for 9T

-very expensive

I use Quantum Design PPMS with the evercool option >2K ,