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KF-18/2B & KF-24/6B Cold Traps

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 vapour 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.

Cold Trap 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

Cold Trap KF-24/6B

One gas path
Maximal flow rate: 25 l/min.
Temperature range: -50 to +70°C dewp.
Accuracy: ± 0.1°C dewp.
Cooling: Peltier cooler
Max. temperature difference to environment: 35 K
Liquid cooling circuit:  Yes
Temperature sensor: Pt100
Hose connections: Hose fittings for 9/12 mm dia. tubing
Operating temperature: -20 to +50 °C
Dimensions: 21 x 46 x 25 cm (W x H x D)
Weight: 10.4 kg
Required temperature controller: TR-KF-24

Controller TR-KF-18

Display: Graphic display with touch panel
Temperature range: -50 to 70°C
Ext. Control Input: 0 to 10 V relating to -50 to 70°C
Analogue Output: 0 to 10 V relating to -50 to 70°C
Computer Connection: USB, RS485
Operating Temperature: -20 to 50°C
Power Consumption with KF-18/2: Standby: 2 W; Maximal: 68 W
Dimensions: 19 x 15 x 27 cm (W x H x D)
Weight: 3.7 kg

Controller TR-KF-24

Display: Graphic display with touch panel
Temperature range: -50 to 70°C
Ext. Control Input: 0 to 10 V relating to -50 to 70°C
Analogue Output: 0 to 10 V relating to -50 to 70°C
Computer Connection: USB, RS485
Operating Temperature: -20 to 50°C
Power Consumption with KF-24/6B: Standby: 17 W; Maximal: 400 W
Dimensions: 50 x 15 x 30 cm (W x H x D)
Weight: 11 kg
Temperature dependence of vapour pressure above water

Temperature dependence of vapour pressure above water

Due to its powerful Peltier coolers, the cold trap can achieve temperature differences of more than 30 K with respect to ambient temperature.

The Cold Trap KF-24/6B can be operated with a liquid cooling cycle for even larger temperature gradients. In addition to the large range, the dewpoint setting is very accurate (0.1 °C).

Cold Traps have one gas path. The functional difference between the versions lies in the maximum flow rate. Cold Trap KF-18/2B has a maximum flow rate of 6 l/min, and Cold Trap KF-24/6B a maximum flow rate of 25 l/min.

If lower temperature gradients are required, slightly higher flow rates can be used. If lower flow rates are used, higher temperature gradients may be achieved.