Sample in vapor variable temperature 'SuperVariTemp' systems provide solutions for an extensive variety of low temperature optical (and non optical) requirements. Samples are cooled by insertion into flowing helium gas exiting from the vaporizer (also known as the diffuser or heat exchanger). The samples are top loading and can be quickly changed while operating.

The temperature of the sample can be varied from typically 1.5 K to room temperature. Liquid helium flows from the reservoir through the adjustable flow valve down to the vaporizer located at the bottom of the sample tube. Applying heat, vaporizes the liquid and raises the gas temperature. This gas enters the sample zone to cool the sample to your selected temperature.

Pumping on the sample zone will provide temperatures below 2 K with either sample in vapor or immersed in liquid. No inefficient liquid helium reservoir pumping is required.

The system uses enthalpy (heat capacity) of the helium vapor which results in very high power handling, fast temperature change, ultra stable temperatures, ease of use an much more - Super Variable Temperature.

Optical 'cold' windows are normally epoxy sealed, strain relief mounted into indium sealed mounts or direct indium mounted. Window seals are reliable and fully guaranteed.

For experiments where flowing vapor may be undesirable (such as mossbauer or infrared detectors), exchange gas cooling and sample in vacuum inserts are available.