Compact cryogenic cooling for small sample chambers from +100°C (+212°F) to -180°C (-292°F)

Compact cryogenic cooling for small sample chambers from +100°C (+212°F) to -180°C (-292°F)

To obtain rapid cooling speeds and very low temperatures, sometimes you have to switch from conventional mechanical cooling to cryogenic cooling. With this scenario in mind, KGW ISOTHERM has developed a new KALTGAS system. In it, a sample chamber is filled with cryogenic nitrogen gas, enabling very low temperatures to be reached at high cooling speeds. The KALTGAS system is highly compact, featuring a flanged end for connecting a variety of glass or metal chambers directly to the gas outlet.

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 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 gas outlet 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 -170°C (-274°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. This steady gas flow can then be used to temper a chamber flanged to the system.

In addition to their high cooling speed and good control stability, another significant advantage of KALTGAS systems is their modular design. Sensors, electronic components, test tubes and all kinds of other items can be tempered simply by exchanging the tempering chamber.

The TG-KKK 63/50 KALTGAS system includes a standard safety control unit SC5 (a temperature controller with current value/set point display and a safety controller with interface), a KF-NW 50 siphon with an LN2 vaporizer (Jet), a removable, evacuable compact N2 gas system with an integrated post-heating module (heater), a PT100 temperature sensor and a vacuum pump with accessories.

Technical data for:

Model TG-KKK 63/50
LN2 vaporizer (Jet)= 500 watts
Heater = 630 watts
LN2 consumption = 1.1l/h to 11l/h (liters per hour)
N2 gas line = V2A, length 1.8 meters, removable, with vacuum pump
for LN2 container with KF NW 50
Order No.: TG-KKK 63/50


- LN2 container with 20 to 300 liter capacity
- glass chamber (size according to customer specifications)
- stainless steel chamber (size according to customer specifications)

Further information on KALTGAS systems available.
Technical data subject to change.


Download information sheet

KaltgasTool: Our Software for Controlling our Kaltgas Systems of Type SC4/5

  • KaltgasTool Setup SC4/5 → free download (Version 4.05.003 of 24/01/2020)