Cryogenic Solutions and IR Instruments for Research
 
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ND Series Dewars
ND Series

The ND 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.


Standard work surface diameters are 3, 5, 8, 10, 12, and 14 inches. Larger sizes, including rectangular extensions, are available upon special request.

 

Applications

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

 

Features

  • Operating temperature range:  50K to 77K (with low temperature modification)
  • Vapor cooled radiation shield
  • Molecular sieve “Getter”
  • Designed to customer specifications
ND Series Specifications

 Inches  ND-3 ND-5
 ND-8 ND-10
ND-12
 ND-14
Dewar Outside Diameter (in)
4.95
6.95
9.95
11.95
13.70
15.95
Dewar Height
 11.38  11.00  10.16  11.00  11.25  11.25
Cold Plate Diameter
 3.12  5.12  8.12  10.18  12.00  14.18
Work Area Height ("B" Dimension)
 1.50  1.50  1.50  2.00  2.00  2.00
Weight Without Cryogens (lbs)
 7.50  10.75  22.00  36.00  48.00  61.00
LN2/LHe Capacity (l)
 0.5  1.2  2.6  4.4  6.4  8.7
LN2/LHE Hold Time (Standard Supports) (hrs)
 24/6  72/18  90/24  115/30  --  --
LN2/LHE Hold Time (Rigid Supports) (hrs)
 --  70/6  80/10  106/12  120/14  143/16

Centimeters  ND-3 ND-5
 ND-8 ND-10
ND-12
 ND-14
Dewar Outside Diameter (cm)
12.57
17.65
25.27
30.35
34.80
40.51
Dewar Height
28.91 27.94  25.81  27.94  28.58  28.58
Cold Plate Diameter
 7.92  13.00  20.62  25.86 30.48  36.02
Work Area Height ("B" Dimension)
 3.81  3.81  3.81  5.08  5.08  5.08
Weight Without Cryogens (kg)
 3.41  10.75  10.00  16.36  21.82  27.73
LN2/LHe Capacity (l)
 0.5  4.89  2.6  4.4  6.4  8.7
LN2/LHE Hold Time (Standard Supports) (hrs)
 24/6  72/18  90/24  115/30  --  --
LN2/LHE Hold Time (Rigid Supports) (hrs)
 --  70/6  80/10  106/12  120/14  143/16