Cold traps control the humidity in a gas stream. For this purpose, the gas stream is directed through the cold trap and cooled down to the set temperature. If the dewpoint of the inflowing gas is above the set temperature value, the excessive water vapor condenses and the outstreaming gas has a defined dewpoint, corresponding to the set temperature value. If required, the gas may be humidified prior to streaming into the cold trap.
The cooling inside the cold trap is performed with Peltier coolers regulated by a temperature controller. The condensate accumulates in a hose and may be let off from time to time.
Temperature Controller TR-KF-6 (maximum gas flow 6 l/min)
Cold Trap KF-24/6B (maximum gas flow 25 l/min)
Temperature Controller TR-KF-24 (maximum gas flow 25 l/min)
Temperature dependence of vapor pressure above water.
Cold traps may be integrated into existing pneumatic structures. They are appropriate for a wide range of applications, such as:
Calibration of humidity sensors (e.g. capacitive humidity measuring cells and dew point mirror measuring systems)
Calibration of infrared H2O gas analyzers
Generation of gas with defined humidity conditions for the inflowing gas of gas-exchange chambers
Usage as part of bypass humidity control units, in order to avoid a rise in humidity as a result of transpiration, in large gas-exchange measuring chambers
Cold Trap KF-18/2B during humidity calibration of the GFS-3000.
KF-18/2B & KF-24/6B (Cold Trap for 6 l/min - KF-18/2B)
One gas path
Maximal flow rate
6 l/min.
Temperature Range
-50 to +70 °C dewp.
Accuracy
±0.1 °C dewp.
Cooling
Peltier cooler
Max. temperature difference to environment
35 K
Temperature sensor
Pt100
Hose connections
Hose fittings for 6/8 mm dia. tubing
Operating temperature
-20 to +50 °C
Dimensions
12 x 27 x 22 cm (W x H x D)
Weight
3.5 kg
Required temperature controller
TR-KF-18
Internal Software TR-KF-6 and TR-KF-24
The Temperature Controllers TR-KF-6 and TR-KF-24 are operated with the software TR-KF provided for Windows PCs. The set temperature, actual temperature and status are indicated. Freely adjustable charts show the time course of set-value and temperature.
Two modes of temperature control are available:
Control to a set temperature
Control to an external signal
There is a choice, how the instrument shall resume operation after a power interruption. User requests can be integrated into the software.
Software of Temperature Controllers TR-KF-6 and TR-KF-24: Main Window.
Software of Temperature Controllers TR-KF-6 and TR-KF-24: Settings Window.