Cryostream-like efficiency and reliability without the liquid
Cobra uses nitrogen gas instead of liquid, offering complete freedom from the challenges of liquid nitrogen such as storage, logistical and safety issues or simply the worry and responsibility of remembering to refill the Dewar. In fact, the Cobra can be left to run for weeks or even months without any user intervention, offering complete peace of mind and a stress-free laboratory environment.
Like the Cryostream, the Cobra is fully programmable, and can produce a cold stream at any temperature between 80 and 500 Kelvin, with a stability of 0.1 Kelvin. If a laboratory nitrogen gas supply is available, this can be used for the Cobra. Otherwise, an optional nitrogen gas generator can be provided, which produces pure dry nitrogen gas from the air.
Room temperature compressed nitrogen gas is cooled by the Cobra refrigerator (which incorporates a GM closed cycle cooler) and delivered to the Cobra head via a vacuum insulated transfer line. Whilst the Cobra head is smaller than the Cryostream coldhead, the dimensions of the nozzle have been retained, meaning the Varibeam support stand can be used to support and position the gas delivery head.
An external stream of nitrogen gas (or dry air) at room temperature provides the shield gas, which prevents icing of the sample
Temperature range: 80-400 Kelvin (or 80-500 Kelvin for Cobra Plus)
Nitrogen gas flow rate: 5 or 10 litres/minute
Temperature stability: 0.1 Kelvin
Cool down time to 100 Kelvin: 40 minutes
Length of transfer line: 2000 mm
Cobra refrigerator weights & dimensions: 15kg, 278 mm x 200 mm x 277 mm
Dimensions & weight: 263 mm W x 141 mm H x 299 mm D
Mains Power supply: 100- 240 V, 50/60 Hz
Power Consumption: 500VA
Weights & dimensions: 100 kg, 639mm H x 610mm D x 540mm W
Electrical requirements: 50 Hz 200 – 240 V , 60 Hz 208 – 230 V
Operating current: 17.0 A (@240 V) 15.7 A (@230 V)
Operating power: 3.4 kW (@ 240 V, 3.6 kW (@230 V
Supply fuse rating: 20 A (Starting current: 65 A)
Water cooling requirement: Chiller of 3.0 kW, typical flow rate 5 l/min at 18 C
Gas purity: >97.5%
Gas pressure: Regulated to 1 bar (max pressure 10 bar)
Gas flow: Approx 25 litres/minute per Cobra
Atmospheric dewpoint of gas: -60°C or better
Gas outlet fitting: ¼” BSPP female
Weights & dimensions: 95 kg, 900 mm W x 700 mm H x 310 mm D
Electrical power supply: 230V, 50Hz, 100V 50Hz, 120V 60Hz, 100V 60H
Our flagship system, offering stable and effective cooling for both single crystal and powder samples.
The Smartstream offers the optimum solution for small molecule crystallographers, with a base temperature of 170 K ( – 103° C ) without liquid nitrogen.
We understand that when it comes to cooling systems, one size does not fit all. So contact us for a sensible discussion about your needs, without any pressure or commitment.
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