Dewars for Liquid Nitrogen and Other Cryogens

Cost-effective vapor-cooled nitrogen dewar operating from 50 K to 70 K

The NDV line of nitrogen dewars contain a single cryogenic vessel. A vapor-cooled radiation shield surrounds the vessel and the cold work surface. The guard vacuum of the dewar is enhanced by a molecular sieve “getter” which is mounted to the cold work surface. Larger sizes, including rectangular extensions, are available upon special request.

Applications:

NDV systems are frequently used for near-IR detector and camera systems including CCD, HgCdTe, and InSb. Applications include materials and electronic component testing.

Features:

• Operating temperature range: 50 K to 77 K (with low temperature modification)
• Open cycle operation
• Vapor cooled radiation shield
• Molecular sieve “getter”
• Standard work surface diameters (in/cm): (3.00/7.62, 5.00/12.70, 8.00/20.32, 10.00/25.40, 12.00/30.48, 14.00/35.56)
• Customizable configuration including size

Efficient vapor-cooled helium dewar operating from 1.8 K to 4.2 K

The helium dewars in the HDV line contain a single cryogenic vessel. A vapor-cooled radiation shield surrounds the vessel and the cold work surface. All interior dewar surfaces are lined with metal foil to provide additional shielding. Larger sizes, including rectangular extensions, are available upon special request.

Applications:

HDV systems are frequently used for mid- and far-IR detector and camera systems including bolometers, photo detectors, HgCdTe, and InSb. Applications include materials and electronic component testing.

Features:

• Operating temperature range: 1.8 K to 4.2 K
• Open cycle operation
• Vapor cooled radiation shield
• Multiple layers of shielding foil
• Standard work surface diameters (in/cm): (3.00/7.62, 5.00/12.70, 8.00/20.32, 10.00/25.40, 12.00/30.48, 14.00/35.56)
• Customizable configuration including size

Cost-effective vapor-cooled nitrogen dewar operating from 50 K to 70 K

The NDL line of nitrogen dewars contain dual liquid nitrogen cryogenic vessels. A liquid-cooled radiation shield surrounds the inner vessel and the cold work surface. The guard vacuum of the dewar is enhanced by a molecular sieve “getter” which is mounted to the cold work surface. Larger sizes, including rectangular extensions, are available upon special request.

Applications:
NDL systems are frequently used for near-IR detector and camera systems including CCD, HgCdTe, and InSb. Applications include materials and electronic component testing.

Features:

• Operating temperature range: 50 K to 77 K (with low temperature modification)
• Open cycle operation
• Liquid cooled radiation shield for very low background radiation
• Extended inner vessel hold times.
• Molecular sieve “getter”
• Standard work surface diameters (in/cm): (3.00/7.62, 5.00/12.70, 8.00/20.32, 10.00/25.40, 12.00/30.48, 14.00/35.56)
• Customizable configuration including size

Proven performance in a liquid-cooled helium dewar operating from 1.6 K to 4.2 K

The helium dewars in the HDL line contain two cryogenic vessels. The LN2 vessel directly cools a radiation shield that surrounds the LHe vessel and the cold work surface. All interior dewar surfaces are lined with metal foil to provide additional thermal shielding. 

Applications:
HDL Systems are frequently used for mid- and far-IR detector and camera systems including bolometers, photodetectors, and InSb. Applications include materials testing, electronic component testing, and the cooling of entire stand-alone instruments.

Features:

• Operating temperature range: 1.6 K to 4.2 K (with low temperature modification)
• Open cycle operation
• Standard 3 to 14 inch (7.5 to 35cm) diameter cold plates
• Liquid cooled radiation shield
• Multiple layers of radiation shielding
• Standard work surface diameters: (in/cm): (5.00/12.70, 8.00/20.32, 10.00/25.40, 12.00/30.48, 14.00/35.56)
• Customizable configuration including size