Low-temperature cooling system type TG-LKF-H for temperature chambers made of glass or metal Temperature range from +100°C to -180°C measured at the internal temperature sensor

KALTGAS is a temperature control system based on the low temperature of liquid nitrogen as a refrigerant. The liquid nitrogen is vaporized in a cryogenic container using a heater (jet). This generates a constant, cryogenic gas flow. By varying the heater (jet) on the safety controller (SC5), both the cooling capacity and the gas flow volume can be changed, and the LN2 consumption can also be reduced to a minimum by varying the jet power. The cryogenic gas flow is then fed through a vacuum-insulated, flexible metal pipe to a heat exchanger (heater). The heat exchanger has the task of heating the cold gas flow to the desired temperature. This means that a predefined gas flow with a predefined temperature is available as cooling gas at the outlet of the cold gas hose. A KALTGAS system can generate a -180°C cold gas flow within a few minutes. The use of different temperature controllers enables the optimum customized design of a KALTGAS system. Depending on the customer’s requirements, temperature stability of up to +/-0.1°C can be achieved by using an optimized controller. With a standard safety controller (SC5), a temperature stability of less than +/-0.2°C is achieved.

This constant gas flow can be used to control the temperature of a chamber, for example. In addition to the high cooling speed and good control stability, the modular design is another advantage of KALTGAS systems. By replacing individual components, such as the N2 gas line, the jet or the heater, the cooling rate or the LN2 consumption, as well as the type of use, can be changed. The basic modules such as the LN2 tank, vacuum pump or temperature control remain unchanged.