KALTGAS is a tempering system that utilizes the very low temperature of liquid nitrogen as a cooling agent. The Jet vaporizes the liquid nitrogen in a cryogenic container, producing a steady cryogenic gas flow. This LN2 vaporizer (Jet) can be adjusted to minimize liquid nitrogen consumption and to change both the cooling rate and the volume of the gas flow. The cryogenic gas flow is then piped through a vacuum insulated flexible metal line (N2 gas line) to a heat exchanger (heater). The heat exchanger is designed to heat the cold gas flow to the desired temperature. The final product, a clearly quantified gas flow exiting the heat exchanger at a clearly defined temperature, is ready for use as a cooling agent. A KALTGAS system needs only a few minutes to produce a cold gas flow with a temperature of -180°C (-292°F). Configuring the KALTGAS system to any customer's individual environment is possible thanks to various temperature controllers that can be embedded inside the safety control unit. Those temperature controllers are available with or without interfaces. By using an optimized temperature controller, a temperature stability of ± 0.1°C can be achieved. With the standard safety control unit (SC5), a temperature stability of better than ± 0.2°C can be achieved.

The steady gas flow can be used to temper a chamber. Another option is a circulating-air tempering system. It circulates the air in the chamber and cools it with a KALTGAS system type G. This setup enables full utilization of LN2 in temperatures above -20°C (-4°F).

In addition to their high cooling speed and good control stability, another advantage of KALTGAS systems is their modular design. By swapping out individual modules such as the N2 gas line, the LN2 vaporizer (Jet) or the heater, it is possible to change the cooling speed, LN2 consumption as well as the application. The basic modules, including the LN2 container, the vacuum pump and the safety control unit, remain unchanged.