Nalgene 4150-2000 All-plastic Dewar Flask

Nalgene 4150-2000, dewar

Brand : Nalgene

Product Code : SKU 1804E CRYOGEN

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All products ship from our 30,000 sq. ft. Haverhill, MA warehouse

Nalgene 4150-2000 All-Plastic Dewar Flask

Not every cryogenic application requires a large liquid nitrogen storage system. Many laboratories simply need a safe, durable vessel for preparing cold baths, temporarily holding liquid nitrogen, or transporting cryogenic materials between workstations. The Nalgene 4150-2000 All-Plastic Dewar Flask was designed specifically for these everyday laboratory tasks, providing excellent thermal insulation in a lightweight, shatter-resistant package that is safer than traditional glass Dewar flasks.

With a 2-liter capacity, the Nalgene 4150-2000 is ideal for research laboratories, biotechnology companies, pharmaceutical manufacturers, hospitals, universities, and teaching laboratories that routinely work with liquid nitrogen, dry ice/solvent mixtures, ice water, or heated liquids. Its all-plastic construction eliminates the implosion hazards associated with glass Dewars while maintaining excellent insulating performance across a wide operating temperature range.

Many laboratories use a Dewar flask like the 4150-2000 alongside cryogenic storage systems for long-term specimen preservation, biosafety cabinets for sterile sample preparation, ultra-low freezers for intermediate storage, and laboratory refrigerators for routine reagent storage.

Nalgene 4150-2000 Key Features

2-liter capacity
All-plastic, shatter-resistant construction
Safe for liquid nitrogen, dry ice/solvent mixtures, ice water, and hot liquids
Double-wall HDPE construction with CFC-free urethane foam insulation
Operating temperature range from -196°C to +100°C
Vented insulated HDPE cover
Molded pour spout
Bottom grip area for controlled pouring
Polyethylene-coated bail handle
Broad-base design for improved stability
Refurbished and inspected by American Instrument Exchange
90-day warranty included

Nalgene 4150-2000 Overview

Unlike laboratory cryogenic storage vessels that are designed for long-term sample preservation, the Nalgene 4150-2000 is intended for short-term laboratory handling of cryogenic and temperature-controlled materials. It provides excellent insulation while remaining lightweight, easy to carry, and highly resistant to impact.

The double-wall HDPE construction is filled with CFC-free urethane foam that minimizes heat transfer, helping cold materials remain cold longer while reducing condensation on the exterior. The vented insulated lid allows vapor to escape safely when used with liquid nitrogen, while the integrated pour spout and bottom grip make transferring liquids safer and more controlled than with conventional laboratory containers.

Common Applications

The Nalgene 4150-2000 is commonly used for:

Holding liquid nitrogen during laboratory procedures
Preparing dry ice and solvent cooling baths
Temporary cryogenic sample handling
Cooling laboratory components
Ice water baths
Temperature-controlled sample transport within the laboratory
Warming media using heated water baths
General laboratory temperature control applications

Ideal Laboratory Types

The Nalgene 4150-2000 is well suited for:

Biotechnology companies
Pharmaceutical laboratories
Academic research laboratories
Hospitals
Clinical laboratories
Teaching laboratories
Materials science laboratories
Quality control laboratories

Any laboratory that routinely handles cryogenic liquids or temperature-controlled baths can benefit from the durability and convenience of this all-plastic Dewar.

Why Choose an All-Plastic Dewar?

Traditional glass Dewar flasks provide excellent insulation but can break or implode if damaged. The Nalgene 4150-2000 replaces fragile glass with high-density polyethylene, creating a vessel that is significantly more resistant to impact while maintaining excellent thermal performance.

For laboratories where Dewars are frequently moved between benches or used in busy work environments, the added durability helps reduce the risk of breakage and improves overall laboratory safety.

Typical Uses

The Nalgene 4150-2000 is designed for the short-term handling of:

Liquid nitrogen
Dry ice/solvent mixtures
Ice water
Heated water
Laboratory cooling baths
Temperature-sensitive components and accessories

It is not intended for long-term cryogenic sample storage, which is better accomplished using dedicated cryogenic storage systems.

Nalgene 4150-2000 Key Specifications

Capacity

2 liters

Construction

High-density polyethylene (HDPE)
Double-wall construction
CFC-free urethane foam insulation

Operating Temperature

-196°C to +100°C

Features

Vented insulated cover
Molded pour spout
Bottom grip area
Polyethylene-coated handle
Broad stable base

Exterior Dimensions

7.25 in. diameter × 10.25 in. H

Interior Dimensions

3.75 in. diameter × 9.0 in. H

Operating Costs & Maintenance

The Nalgene 4150-2000 requires no electrical power or routine mechanical maintenance. Periodic inspection of the lid, handle, and vessel for physical damage is generally sufficient. The all-plastic construction resists corrosion and eliminates concerns associated with broken glass, making the flask suitable for routine laboratory use over many years.

Specifications compiled from Thermo Scientific manufacturer literature and American Instrument Exchange product information.

Inspection & Preparation

Every Nalgene 4150-2000 offered by American Instrument Exchange is inspected for overall condition, lid fit, handle integrity, insulation performance, and cleanliness before shipment. Because this is a passive laboratory vessel with no mechanical or electronic components, our inspection focuses on structural integrity and safe operation.

Laboratories purchasing cryogenic accessories often pair them with cryogenic storage systems, ultra-low freezers, biosafety cabinets, laboratory refrigerators, and centrifuges from American Instrument Exchange.

Shipping & Handling Considerations

The Nalgene 4150-2000 ships using standard parcel service from American Instrument Exchange. Before use with liquid nitrogen, laboratories should ensure personnel follow appropriate cryogenic safety procedures, including the use of insulated gloves, eye protection, and adequate room ventilation.

Frequently Asked Questions

Can the Nalgene 4150-2000 safely hold liquid nitrogen?

Yes. The flask is specifically designed for use with liquid nitrogen, as well as dry ice/solvent mixtures, ice water, and hot liquids over a temperature range of -196°C to +100°C.

Why choose an all-plastic Dewar instead of a glass Dewar?

The HDPE construction is shatter-resistant and eliminates the implosion risk associated with glass Dewar flasks while still providing excellent thermal insulation.

Can this flask be used for long-term cryogenic sample storage?

No. The 4150-2000 is intended for short-term handling and laboratory use. Long-term sample preservation should be performed in dedicated liquid nitrogen storage systems or cryogenic freezers.

How is the Nalgene 4150-2000 inspected before shipment?

Each unit is inspected by American Instrument Exchange for structural integrity, lid fit, handle condition, insulation performance, and overall cleanliness before shipment.

Testing Procedures for Used and Refurbished Laboratory Freezers

Cold Storage Reliability from American Instrument Exchange

At American Instrument Exchange, every used and refurbished laboratory freezer we offer undergoes a comprehensive multi-point testing protocol to ensure optimal performance, temperature stability, and long-term reliability. Our rigorous testing procedures are designed to meet the demanding standards of biomedical, pharmaceutical, research, and clinical environments—so you can trust your freezer to protect your valuable samples and materials.

Why Testing Refurbished Laboratory Freezers Is Critical

Before any laboratory freezer is placed back into service, it must be carefully tested for:

Consistent temperature control and uniformity across internal zones
Compressor functionality and refrigeration system performance
Seal integrity and insulation efficiency to prevent temperature loss
Electrical safety and alarm system operation

Thorough testing minimizes the risk of temperature excursions, equipment failure, and product loss—especially for temperature-sensitive items like reagents, biological samples, and vaccines.

Our structured testing protocol ensures that all used and refurbished laboratory freezers meet or exceed manufacturer specifications and industry expectations.

Key Testing Procedures for Laboratory Freezers

1. Visual and Structural Inspection

Examine the exterior for dents, corrosion, or physical damage
Check door gaskets, hinges, and latches for wear and functionality
Inspect power cords, control panels, and internal compartments

2. Functional Startup and System Check

Power on the unit to verify startup sequence, control panel functionality, and display readability
Test programmable settings, alarms, and door-open sensors
Ensure proper door closure and sealing performance

3. Temperature Performance and Stability Testing

Test temperature sensors using certified thermometers or probes
Monitor chamber temperature at multiple points over extended run periods
Verify temperature uniformity and accuracy across common lab setpoints (e.g., -20°C, -30°C)

4. Compressor and Refrigeration System Evaluation

Test compressor startup, cycling behavior, and operating noise
Check condenser coils, evaporators, and fans for performance and cleanliness
Inspect for refrigerant leaks or pressure issues that may affect efficiency

5. Electrical Safety and Compliance Verification

Confirm proper grounding and insulation of all electrical components
Conduct safety testing to meet laboratory equipment electrical standards
Verify functionality of alarms for power loss, temperature excursions, and system faults

6. Final Quality Assurance and Runtime Validation

Conduct multi-day test cycle to confirm stable performance under continuous use
Record temperature data, alarm responses, and compressor cycling metrics
Complete final inspection and prepare detailed service documentation

Reliable Cold Storage, Backed by Testing Excellence

Each refurbished laboratory freezer from American Instrument Exchange is tested and certified for cold storage accuracy, safety, and performance. Whether upright, undercounter, flammable-material rated, or specialty-purpose, our lab freezers are restored to meet real-world research and clinical demands.

Trust American Instrument Exchange for dependable, tested, and warrantied laboratory refrigeration—ready to support your lab from day one.

Repair and Refurbishment Protocol for Used Laboratory Freezers
Certified Cold Storage Performance from American Instrument Exchange

At American Instrument Exchange, every used laboratory freezer we offer is subjected to a comprehensive repair and refurbishment protocol. Whether it’s a general-purpose lab freezer, flammable-material grade unit, or undercounter model, our goal is to restore each system to peak performance—ensuring consistent temperature control and reliable operation.

Why Choose a Refurbished Laboratory Freezer from American Instrument Exchange?

• Fully tested for cold storage accuracy and operational safety
• Backed by a warranty
• Cost-effective alternative to new refrigeration equipment
• Sustainably refurbished to reduce environmental impact
• Serviced by expert technicians with decades of laboratory equipment experience

Step-by-Step Refurbishment Protocol

Every laboratory freezer from American Instrument Exchange follows a detailed, multi-stage process to ensure top-tier performance and reliability:

1. Initial Intake & Inspection

• Visual inspection for dents, corrosion, or structural damage
• Mechanical check of door hinges, gaskets, seals, and internal components
• Documentation of missing parts or areas requiring repair or replacement

2. Cleaning and Decontamination

• Internal and external cleaning using non-abrasive cleaners
• Decontamination/cleaning of all surfaces to remove biological or chemical residues
• Thorough cleaning of shelving, drawers, and removable interior parts

3. Mechanical and Electrical Repairs

• Replacement or repair of worn mechanical parts (door latches, seals, hinges, etc.)
• Inspection and restoration of control interfaces, thermostats, sensors, and displays
• Evaluation of wiring, relays, fuses, and power supply components for safety and integrity

4. Refrigeration System and Compressor Evaluation

• Testing of compressor function, condenser coils, and evaporators
• Inspection for refrigerant leaks and pressure performance (if applicable)
• Verification of proper airflow, fan operation, and defrost cycles

5. Temperature Calibration and Performance Testing

• Testing of temperature sensors and control boards
• Verification of temperature stability and uniformity throughout the chamber
• Testing of multiple setpoints (e.g., -20°C to -30°C) over extended operating periods

6. Safety and Compliance Checks

• Inspection of grounding and electrical insulation per lab safety standards
• Testing of alarm systems (if applicable) for temperature excursions or power failure

7. Final Quality Control and Documentation

• Multi-day operational test
• Final cleaning, inspection, and performance validation
• Detailed service report with temperature logs and repair notes

Trust the Experts at American Instrument Exchange

With over 50 years of industry experience, American Instrument Exchange is a leading provider of high-quality refurbished laboratory equipment. Our proven laboratory refrigerator refurbishment protocol ensures consistent, accurate cold storage—so you can safeguard your samples with confidence.

Warranty Information

All used equipment sold by American Instrument Exchange is refurbished/reconditioned, tested to meet specifications, cleaned, and comes with a 90-day warranty from the date of shipment unless otherwise specified. New products include a warranty from the manufacturer. Your warranty is only valid if you have paid your invoice. If your invoice is over 30 days old, warranty work will not be performed until your invoice is paid in full. American Instrument Exchange is not liable for any special or consequential damages that result from the use of, or the inability to use, the materials on this site or the performance of the products,

Exceptions include international sales and items that are agreed to be sold with a lesser warranty or items that are agreed to be sold “as is.”

Should there be visible shipping damage to packaging or concealed shipping damage to item(s) supplied, buyer must communicate such damage to the delivering entity or carrier upon receipt first and to American Instrument the same day item is accepted / signed for. Failure to do so voids warranty. Customer decision to involve / procure third party or OEM service other than American Instrument or AIE assigned vendors to resolve in-warranty instrument failure or defect without first placing a service call to American Instrument voids warranty.

Return & Cancellation Policy

American Instrument Exchange will authorize the return of and issue a full refund for any equipment that is not working as represented and could not be replaced or repaired to the customer’s satisfaction by AIE or a representative of AIE during the warranty period. Returns without prior authorization and an RMA number will not be accepted.

Customers are responsible for proper packaging of the equipment and all included accessories. American Instrument will pay for insurance and shipping costs. Non-inventory items bought specifically to fill customer orders may possibly be returned, but on a case by case basis.

Customers who cancel orders after refurbishing has begun or after delivery where there are no equipment performance issues may be subject to a Restocking/Cancellation Fee of 20% or more and responsible for shipping costs for both the delivery and return.

Ongoing and Extended Support Options

American Instrument Exchange is able to provide additional repair and support services outside the warranty terms for most products that sell.

For biosafety cabinets, clean benches, chemical fume hoods, and other clean air products our team at AIE Laboratory Services can provide certifications, repairs, decontaminations, and other services for customers throughout New England, and guidance and limited technical assistance for any customers in the US and Canada for new or refurbished biosafety cabinets purchased from American Instrument Exchange.

For all other products, the repair service team at American Instrument Exchange can provide both field and depot repair evaluations. We can easily schedule and coordinate the pick-up and transportation of your malfunctioning equipment. By offering hourly rates lower than most OEM service providers and eliminating travel time for technicians, we help reduce repair costs. Furthermore, our lab depot repair service minimizes or eliminates scheduling delays. Our experienced service technicians are qualified to restore your equipment to factory specifications.

Please contact our team at info@americaninstrument.com for more details.

FAQ

Does the equipment come with a warranty?

Yes, all equipment from American Instrument Exchange comes with a warranty.
Used/reconditioned/refurbished equipment is tested to make sure it operates to the manufacturer's specifications and comes with a 90-day warranty (unless otherwise noted). New equipment comes with a warranty from the manufacturer.

How do you test and recondition the equipment?

Testing requirements vary across all the equipment categories we sell. Temperature controlled units are tested with NIST traceable probes and data loggers. Gaskets, external housing, glass, handles, controls and control screens are all thoroughly inspected for integrity and functionality.
We test all equipment using the manufacturer's parameters and specifications to confirm that the unit operates properly.

How do products ship from American Instrument Exchange?

We can ship products both nationally and internationally using a well-established network of transporters. Smaller items will ship via UPS. Larger equipment will be palletized and shipped either LTL or air-ride, depending on the specific equipment and/or delivery requirements.

Return and order cancellation policy

American Instrument Exchange will accept the return of any product that is not working as represented and could not be replaced or repaired to the customer's satisfaction during the warranty period. Customers who cancel orders after refurbishing has begun will be subject to a cancellation and restocking fee of between 20% and 40%.

Are discounts available for educational or non-profit institutions, or for bulk purchases?

Yes – call or email us today with a list of equipment you're looking for and we can potentially put together a quote that includes a discount.

How does your price matching policy work?

We strive to keep our pricing competitive and reasonable. If you find comparable items for sale at a lower price from other vendors please send us a link and or quote for the item and we'll do our best to match or beat the price.

Can I see the equipment in person before committing to a purchase?

Customers are welcome to make an appointment to view equipment in our warehouse. Given our workload we may not be able to test or clean the equipment prior to your arrival if you have not committed to an order.

1023 Western Avenue is a working warehouse, not a showroom, and customers should dress appropriately and wear closed toe shoes.

Can I ship products that I purchased elsewhere to American Instrument for repair?

Yes – please see our repair services page for more information.