The basic principle of a He-3 cryostat is to condense He-3 gas by bringing it in contact with a pumped He-4 reservoir (1 K pot) or with a cryocooler. Low temperatures below 300 mK are then generated by reducing the vapor pressure on top of the liquid He-3 reservoir with either an internal (sorption) or an external pumping system. This may be done in a continuous flow mode or in a single shot mode. Continuous flow operating systems provide much higher cooling power, but are generally more costly and require customized designs that are highly application dependent. If such a system is needed, please feel free to contact us and discuss these systems with our ultra low temperature physicists and engineers. These pages highlight the various standardized types of long term operating single shot systems with very quick regeneration times.