{"id":322,"date":"2020-08-28T11:35:25","date_gmt":"2020-08-28T18:35:25","guid":{"rendered":"https:\/\/www.irlabs.com\/?page_id=322"},"modified":"2024-02-21T14:55:08","modified_gmt":"2024-02-21T21:55:08","slug":"liquid-cryogen-dewars","status":"publish","type":"page","link":"https:\/\/www.irlabs.com\/products\/cryostats\/liquid-cryogen-dewars\/","title":{"rendered":"LN2 Dewars and Dewars for Other Liquid Cryogens"},"content":{"rendered":"

LN<\/span>2<\/sub> dewars and dewars for other liquid cryogens have to meet different requirements for different industries. Our highly efficient dewars for liquid nitrogen and other cryogens offer cryogen use, long hold times, and multi-application flexibility. We provide high efficiency liquid nitrogen (LN<\/span>2<\/sub>) dewars for 77 to 50 K and liquid helium (LHe) dewars for 4.2 to 1.6 K. Standard open cycle dewar sizes range from 3 to 14 inch (7.5 to 35cm) in diameter. Our dewars are designed for efficient cryogen use, long hold times, and user flexibility to configure the dewar for more than one specific application or test.<\/span><\/h4>\n<\/div><\/div><\/div><\/div><\/div>

Dewar Product Comparison<\/h2>\n<\/div>\n
\n\n\n\n\n\n\n\n\n\n\n\n
Dewars Comparison Table<\/th>\nNitrogen Dewars<\/th>\nHelium Dewars<\/th>\n<\/tr>\n<\/thead>\n
Series Name<\/td>\nNDV<\/td>\nNDL<\/td>\nHDV<\/td>\nHDL<\/td>\n<\/tr>\n
Vessels<\/td>\nSingle<\/td>\nDual<\/td>\nSingle<\/td>\nDual<\/td>\n<\/tr>\n
Operating Temp (K) with Vapor Pressure = 1 ATM<\/td>\n77<\/td>\n77<\/td>\n4.2<\/td>\n4.2<\/td>\n<\/tr>\n
Low end operating temperature (K) when pumping on liquid bath to reduce vapor pressure < 1 ATM<\/td>\n< 55<\/td>\n< 55<\/td>\n1.8<\/td>\n1.6<\/td>\n<\/tr>\n
Diameters of Cold Work Surface (inches)<\/td>\n3, 5, 8, 10, 12, 14, 16<\/td>\n3, 5, 8, 10, 12, 14, 16<\/td>\n3, 5, 8, 10, 12, 14, 16<\/td>\n3, 5, 8, 10, 12, 14, 16<\/td>\n<\/tr>\n
Liquid Cooled Radiation Shield<\/td>\nNO<\/td>\nYES<\/td>\nNO<\/td>\nYES<\/td>\n<\/tr>\n
Vapor Cooled Radiation Shield<\/td>\nYES<\/td>\nNO<\/td>\nYES<\/td>\nNO<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div><\/div><\/div><\/div>
\"Dewars<\/a><\/span><\/div>

NDV Series<\/h3><\/div><\/div><\/div><\/div>

Cost-effective vapor-cooled nitrogen dewar operating from 50 K to 70 K<\/h4>\n

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 \u201cgetter\u201d which is mounted to the cold work surface. Larger sizes, including rectangular extensions, are available upon special request.<\/span><\/p>\n

Applications:<\/b><\/p>\n

NDV systems are frequently used for near-IR detector and camera systems including CCD, HgCdTe, and InSb. Applications include materials and electronic component testing.<\/span><\/p>\n

Features:<\/b><\/p>\n