Versatile Liquid Nitrogen Storage Solutions

We offer a diverse selection of cryogenic storage vessels tailored for the modern microscopy lab. Our aluminum cryo dewars (4L - 50L) feature advanced vacuum insulation, providing extended holding times for reliable cryogenic sample storage. For daily tasks like filling Vitrobot dewars, our foam cryo pitcher offers a safe, shatterproof alternative to traditional glass.

1. Large Cryogenic Dewars (Aluminum)

Designed for durability and efficiency, these LN2 storage dewars feature a lightweight aluminum shell and a thermally insulated neck. Available in capacities from 4 liters to 50 liters, with static holding times up to 135 days. Accessories include roller base dewars for mobility and tipping stands for safe pouring.

2. Foam Cryo Dewars & Pitchers

Our foam dewar liquid nitrogen containers are chemically inert and mechanically durable. They reduce LN2 boil-off due to low thermal mass and do not frost over like glass. The pitcher style dewar is essential for precise liquid nitrogen transfer to small reservoirs without spillage.

3. Lab Grade Glass Dewars

For benchtop applications, we supply Pope dewar lab grade flasks made from fully silvered borosilicate glass. These wide mouth dewars are ideal for immersing samples and are available with protective mesh or full aluminum housings for safety.

Specialized Accessories

• Dewar Dryer Rack: A specialized system to quickly dry 4L dewars, ensuring moisture-free dewar drying between uses.
• Liquid Withdrawal Device: Enables safe pressure transfer from large dewars (25L-50L) at up to 8 liters per minute.
• Dry Shipper Dewar: An IATA compliant shipper designed to transport samples safely at cryogenic temperatures without liquid spillage.

Model Type	Capacity	Material	Application
Storage Dewar	4L, 10L, 25L, 35L, 50L	Aluminum / Vacuum	Long-term LN2 Storage
Foam Pitcher	500ml, 1000ml	Closed-Cell Foam	Safe Pouring / Transfer
Lab Grade	350ml - 1000ml	Borosilicate Glass	Benchtop Immersion
Dry Shipper	~4L (Absorbed)	Aluminum / Adsorbent	Safe Transport

Frequently Asked Questions

1. How long can these dewars hold liquid nitrogen?

Holding times vary by size and type. Our high-efficiency aluminum cryo dewars can hold LN2 from 10 days (4L model) up to 152 days (35L model) under static conditions.

2. Are foam dewars safe for liquid nitrogen?

Yes. Our foam cryo dewars are made from a specialized cryogenic-grade closed-cell foam that withstands LN2 temperatures without cracking or leaking, offering a safer, non-shattering alternative to glass.

3. Can I transport these dewars?

Standard liquid dewars should not be transported by air. For shipping samples, you must use our IATA compliant dry shipper dewar, which absorbs the liquid to prevent spills while maintaining cryogenic temperatures.

4. Do you offer a way to pour heavy dewars safely?

Yes, we provide tipping stands specifically designed for our 25L and larger dewars. These support the weight of the flask, allowing you to pour LN2 safely and with control.

5. How do I dry my dewar quickly?

We recommend using our Dewar Dryer Rack. It circulates warm, filtered air into the inverted flask, completely drying a 4L dewar in about 35 minutes to prevent ice contamination in future runs.