Let’s Dive into VWRCryoPro Liquid Dewars, L Series L-20 L-20 Liquid Dewar
The VWRCryoPro Liquid Dewars, L Series L-20 L-20 Liquid Dewar from VWR is more than just a container; it’s a crucial piece of equipment for anyone working with cryogenic materials. This dewar is designed for the safe storage and dispensing of liquid nitrogen, offering a balance of capacity and portability that’s often hard to find.
My work in a remote field research lab, focusing on sample preservation in extreme environments, demanded a reliable and relatively portable cryogenic storage solution. I needed something that could hold enough liquid nitrogen for extended periods in the field without excessive evaporation.
Upon unboxing, the immediate impression was of robust build quality and thoughtful design. The stainless steel exterior feels incredibly durable, and the relatively compact size for a 20-liter dewar made it seem manageable for transport. Its weight, while noticeable, felt appropriate for the capacity and insulation it offers.
I considered other dewars from Taylor-Wharton and Worthington Industries, but the VWRCryoPro stood out due to its specified static evaporation rate and overall dimensions. The L-20’s advertised evaporation rate seemed lower than comparable models, which was a key factor in my decision.
I was initially excited to finally have a portable solution for cryogenic sample preservation that didn’t require constant replenishment of liquid nitrogen. I hoped the VWRCryoPro would live up to its specifications and make remote field work much more efficient.
Real-World Testing: Putting VWRCryoPro Liquid Dewars, L Series L-20 L-20 Liquid Dewar to the Test
First Use Experience
My first field test of the VWRCryoPro Liquid Dewars, L Series L-20 Liquid Dewar was in the high-altitude Andes Mountains, where we were collecting biological samples for genomic analysis. The dewar was transported in a ruggedized vehicle over rough terrain, and used in temperatures ranging from -5°C to 15°C.
The dewar performed well, maintaining the samples at cryogenic temperatures despite the temperature fluctuations and vibrations during transport. Dispensing the liquid nitrogen was straightforward, and the relatively narrow neck helped minimize evaporation during the process. There were no noticeable issues during this initial field test.
After the first use, I realized the importance of having a stable base for the dewar, especially on uneven terrain. I also noted a slight increase in evaporation rate compared to the lab environment, likely due to the higher altitude and lower air pressure.
Extended Use & Reliability
After several months of use in various field locations, the VWRCryoPro Liquid Dewars, L Series L-20 Liquid Dewar has proven to be a reliable and durable piece of equipment. The stainless steel exterior has held up well, showing only minor scratches from handling.
The dewar has consistently maintained its ability to store liquid nitrogen for extended periods, though the evaporation rate is sensitive to ambient temperature. Regular checks and top-offs are necessary to ensure optimal sample preservation. Cleaning the dewar is relatively simple, requiring only warm water and mild detergent.
Compared to previous experiences with less robust cryogenic storage solutions, the VWRCryoPro L-20 has significantly improved our sample preservation capabilities. Its portability and relatively low evaporation rate have made it an indispensable tool for remote field research.
Breaking Down the Features of VWRCryoPro Liquid Dewars, L Series L-20 L-20 Liquid Dewar
Specifications
The VWRCryoPro Liquid Dewars, L Series L-20 Liquid Dewar features a 21-liter liquid nitrogen capacity. The static evaporation rate is rated at 0.18 liters per day. It weighs 9 kg (19.8 lbs) empty and 26 kg (57.3 lbs) when full. The neck diameter is 5.1 cm (2 inches). The overall dimensions are 62.7 cm (24 11/16 inches) in height and 36.8 cm (14 1/2 inches) in outside diameter.
These specifications are crucial for understanding the dewar’s portability, storage capacity, and efficiency. The low evaporation rate ensures longer hold times, while the relatively narrow neck minimizes heat transfer. The manageable weight allows for easier transport to remote locations.
Performance & Functionality
The VWRCryoPro Liquid Dewars, L Series L-20 Liquid Dewar performs admirably in its primary function: safely storing liquid nitrogen and maintaining cryogenic temperatures. Its consistent evaporation rate and robust construction provide confidence in sample integrity.
While the dewar’s capacity is suitable for most field applications, longer expeditions might require larger storage solutions or replenishment strategies. The dewar meets expectations for a mid-sized liquid nitrogen storage container.
Design & Ergonomics
The VWRCryoPro Liquid Dewars, L Series L-20 Liquid Dewar is constructed with a durable stainless steel exterior and a well-insulated interior. Its cylindrical design provides stability, and the carrying handle allows for easier transport.
The dewar is relatively user-friendly, requiring minimal training to operate safely. The narrow neck design reduces evaporation, but also limits the size of objects that can be directly inserted into the liquid nitrogen.
Durability & Maintenance
The VWRCryoPro Liquid Dewars, L Series L-20 Liquid Dewar is built to withstand the rigors of field use. Its stainless steel construction is resistant to corrosion and impact damage.
Maintenance involves regular cleaning with warm water and mild detergent, and periodic inspection for signs of damage. With proper care, the dewar should provide years of reliable service.
Accessories and Customization Options
The VWRCryoPro Liquid Dewars, L Series L-20 Liquid Dewar can be customized with optional accessories such as a phase separator and a stainless steel transfer hose. These accessories enhance the efficiency and safety of liquid nitrogen dispensing.
The dewar is also compatible with various aftermarket pouring spouts and level indicators. The availability of these accessories allows users to tailor the dewar to their specific needs and applications.
Pros and Cons of VWRCryoPro Liquid Dewars, L Series L-20 L-20 Liquid Dewar
Pros
- Excellent thermal insulation, resulting in a low static evaporation rate.
- Durable stainless steel construction, capable of withstanding harsh field conditions.
- Relatively compact size and manageable weight for a 21-liter dewar.
- Easy to use and maintain, requiring minimal training and effort.
- Availability of optional accessories for enhanced functionality.
Cons
- The initial cost of $1879 is significant and may be a barrier for some users.
- The evaporation rate can be sensitive to ambient temperature and altitude.
- The narrow neck design may limit the size of items that can be directly immersed in liquid nitrogen.
Who Should Buy VWRCryoPro Liquid Dewars, L Series L-20 L-20 Liquid Dewar?
The VWRCryoPro Liquid Dewars, L Series L-20 Liquid Dewar is perfect for: field researchers, cryobiologists, veterinarians, and anyone requiring portable cryogenic storage. Specifically, this dewar will benefit those conducting remote research, requiring robust and reliable sample preservation.
This product is not ideal for: large-scale industrial applications requiring very high volume or extremely low evaporation rates. Additionally, those on a very tight budget may need to consider alternative, less expensive solutions, even if they compromise on portability or efficiency.
A must-have accessory for this dewar is a reliable liquid nitrogen level indicator, to monitor the contents and avoid unexpected depletion. Consider purchasing a phase separator and transfer hose for safer and more efficient liquid nitrogen dispensing.
Conclusion on VWRCryoPro Liquid Dewars, L Series L-20 L-20 Liquid Dewar
Overall, the VWRCryoPro Liquid Dewars, L Series L-20 Liquid Dewar is a well-designed and reliable solution for portable cryogenic storage. Its low evaporation rate, durable construction, and ease of use make it an excellent investment for professionals working in demanding environments.
The price is certainly justified by the performance and reliability it offers. It is a crucial element in maintaining sample integrity during our important research.
I would definitely recommend the VWRCryoPro L-20 to anyone in need of a portable and efficient liquid nitrogen dewar. If you value reliability, durability, and ease of use, this is a worthwhile investment.