Stirling Ultracold Undercounter Freezer SU105UE

Brand : Stirling

Product Code : SKU 2543EE FREEZER

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

Stirling Ultracold SU105UE Undercounter Ultra-Low Temperature Freezer

Not every laboratory needs a full-size upright ultralow freezer. Many research groups simply need dependable -86°C storage close to where experiments happen. The Stirling Ultracold SU105UE Undercounter Ultra-Low Temperature Freezer was designed specifically for these environments, delivering full ultra-low temperature performance in a compact cabinet that fits beneath laboratory benches, stacks easily, or operates as a freestanding unit.

With 3.7 cubic feet (105 liters) of storage capacity, room for up to 72 standard 2-inch cryoboxes, and a temperature range from -20°C to -86°C, the SU105UE provides dedicated ultra-low storage for individual laboratories, clinical departments, pharmaceutical production suites, and research groups that do not require a large central freezer. Powered by Stirling's patented free-piston engine, it delivers dependable sample protection while consuming significantly less energy than many conventional compressor-based ULT freezers.

Laboratories creating a complete cold storage workflow often use compact ultralow freezers alongside laboratory refrigerators for refrigerated products, laboratory freezers for intermediate-temperature storage, and full-size ultralow freezers for centralized sample archives. The SU105UE fills the gap by placing ultra-low storage exactly where researchers need it.

Stirling Ultracold SU105UE Key Features

3.7 cu. ft. (105 L) storage capacity
Holds up to 72 standard 2-inch cryoboxes
Adjustable operating temperature from -20°C to -86°C
Patented free-piston Stirling engine
Compressor-free refrigeration system
Fits beneath standard laboratory countertops
Stackable cabinet design
Operates on 100–240V, 50/60 Hz worldwide power
Touchscreen graphical user interface
Audible and visual alarm system
Less than 4 kWh/day energy consumption at -80°C
Natural refrigerants
Refurbished and performance tested by American Instrument Exchange
90-day warranty included

Stirling Ultracold SU105UE Overview

The SU105UE was developed for laboratories where valuable floor space is just as important as dependable ultra-low temperature storage. Its compact footprint allows researchers to install a dedicated ULT freezer directly within the laboratory rather than relying exclusively on centralized freezer rooms.

Unlike traditional cascade refrigeration systems, the SU105UE uses Stirling's patented free-piston engine to continuously modulate cooling output instead of cycling compressors on and off. This design reduces mechanical complexity, lowers energy consumption, minimizes laboratory heat generation, and provides excellent temperature stability throughout daily operation.

Many laboratories position the SU105UE alongside biosafety cabinets, CO₂ incubators, and refrigerated centrifuges, allowing researchers to prepare, process, and preserve valuable biological samples within the same workspace while minimizing unnecessary sample transport.

Common Applications

The Stirling Ultracold SU105UE is commonly used for:

Cell line storage
Stem cell research
DNA and RNA libraries
Clinical specimens
Tissue samples
Plasma and serum
Protein samples
Enzymes
Vaccines
Pharmaceutical compounds
Biological reference materials
Departmental research collections

Its compact footprint makes it particularly well suited for individual research laboratories, university departments, hospital specialty laboratories, biotechnology startups, GMP cleanrooms, and satellite laboratory facilities where a full-size upright ultralow freezer would occupy unnecessary space.

Ideal Laboratory Types

The SU105UE is an excellent choice for:

Academic research laboratories
Biotechnology companies
Pharmaceutical manufacturers
Cell and gene therapy laboratories
Hospitals and clinical laboratories
University core facilities
Public health laboratories
Cleanroom environments
Research groups requiring dedicated ultra-low storage

Temperature Recovery & Sample Protection

Although compact, the SU105UE delivers the same ultra-low temperature performance expected from larger Stirling platforms. The free-piston Stirling engine continuously adjusts cooling output to maintain stable cabinet temperatures while minimizing energy consumption.

Vacuum insulation panels maximize usable storage volume while improving thermal efficiency, and the compact cabinet volume allows rapid recovery following routine door openings. Laboratories preserving especially valuable biological collections often use the SU105UE alongside cryogenic storage systems, allowing each preservation technology to support the applications where it performs best.

Typical Stored Materials

The SU105UE is commonly used to store:

DNA and RNA libraries
Cell lines
Stem cells
Tissue specimens
Plasma and serum
Vaccines
Enzymes
Protein samples
Clinical specimens
Pharmaceutical compounds
Biological reference materials

Stirling Ultracold SU105UE Key Specifications

Capacity

3.7 cu. ft. (105 L)
Up to 72 standard 2-inch cryoboxes

Temperature Range

Adjustable from -20°C to -86°C

Refrigeration System

Patented free-piston Stirling engine
Compressor-free design
100% natural refrigerants

Monitoring & Controls

Touchscreen graphical user interface
Audible and visual alarms
Optional wireless temperature monitoring

Installation

Undercounter installation
Freestanding installation
Stackable configuration

Electrical Requirements

100–240V AC
50/60 Hz
Worldwide compatible power input

Dimensions

Approximately 27" W × 28" D × 34" H

Weight

Approximately 220 lbs.

Energy Efficiency & Operating Costs

One of the defining advantages of the SU105UE is its exceptionally low operating cost. The patented Stirling engine consumes less than 4 kWh/day at -80°C, generates significantly less heat than conventional cascade refrigeration systems, and eliminates compressor cycling. For laboratories operating multiple ULT freezers, these savings can reduce both electrical consumption and HVAC demand while supporting institutional sustainability initiatives.

Specifications compiled from Stirling Ultracold manufacturer literature and American Instrument Exchange product information.

Refurbishment & Testing Process

Every Stirling Ultracold SU105UE received by American Instrument Exchange undergoes a comprehensive inspection and extended performance evaluation before shipment. Our technicians verify pull-down performance, confirm stable operation throughout the operating temperature range, inspect the Stirling engine cooling system, test alarms and touchscreen controls, evaluate door gaskets and cabinet insulation, verify temperature stability, and thoroughly clean the freezer before delivery.

Shipping & Installation Considerations

The Stirling Ultracold SU105UE ships by freight from American Instrument Exchange. Before installation, laboratories should verify undercounter clearances, electrical service, and adequate ventilation around the cabinet. Its compact footprint and worldwide power compatibility make it easy to install in existing laboratories, cleanrooms, mobile research environments, or facilities with limited available space.

Frequently Asked Questions

Can the SU105UE fit underneath a standard laboratory bench?

Yes. The SU105UE was specifically designed for undercounter installation, allowing laboratories to place ultra-low temperature storage directly within the research workspace while preserving valuable floor space.

Why would a laboratory choose an undercounter ULT instead of a full-size upright freezer?

Many laboratories don't need hundreds of cryoboxes of storage. The SU105UE provides dedicated ultra-low storage for individual research groups, specialty laboratories, or departmental applications without the footprint, energy use, or cost of a larger upright freezer.

Can the SU105UE operate internationally?

Yes. The freezer accepts 100–240V, 50/60 Hz input power, allowing it to operate worldwide without requiring dedicated regional models or voltage conversion.

What makes Stirling engine technology different from conventional ULT refrigeration?

Instead of using traditional compressors and cascade refrigeration, the SU105UE uses a patented free-piston Stirling engine with very few moving parts. This design provides excellent temperature stability, low energy consumption, quiet operation, and reduced maintenance while maintaining dependable ultra-low temperature performance.

Testing Procedures for Used and Refurbished Laboratory Equipment

Ensure Accuracy, Safety, and Dependable Performance Across Applications

At American Instrument Exchange, all used and refurbished laboratory equipment undergoes a rigorous, multi-point testing protocol to ensure optimal performance, operational safety, and long-term reliability. Whether the equipment is destined for research, diagnostics, quality control, or production environments, our thorough inspection and testing process is designed to meet the highest standards of laboratory excellence.

Why Testing Used Lab Equipment Is Essential

Before any refurbished laboratory equipment is returned to service, it must be carefully tested to verify:

• Functional integrity and operational performance
• Setpoint accuracy and repeatability (where applicable)
• User interface responsiveness and control features

Proper testing reduces the risk of equipment failure, measurement inaccuracies, or user hazards—helping to ensure consistent results in clinical, academic, biotech, and industrial labs.

Our standardized lab equipment testing procedures are tailored to each equipment type, ensuring every unit meets manufacturer specifications and industry benchmarks.

Key Testing Procedures for Refurbished and Used Laboratory Equipment

1. Initial Visual Inspection

• Examine equipment housing for signs of wear, corrosion, or damage
• Check ports, power cords, and exterior components for tampering or deterioration
• Verify that internal and external parts (racks, shelves, connectors, accessories) are present and undamaged

2. Functional Startup and Operational Testing

• Power on the equipment and verify startup diagnostics
• Confirm functionality of displays, buttons, switches, and control panels
• Run basic functions to confirm proper response and behavior under standard operating conditions

3. Testing and Performance Verification

• Test internal sensors or control systems using industry-standard tools
• Perform operational tests to validate accuracy and consistency
• Verify key performance specifications such as temperature control, timing, speed, or measurement outputs, depending on equipment type

4. Mechanical and Electrical System Testing

• Evaluate motors, pumps, fans, or other moving parts for smooth operation
• Inspect and test wiring, relays, fuses, and circuit boards for safety and reliability
• Test power delivery and grounding compliance

5. Safety and Compliance Checks

• Ensure equipment is grounded and insulated to meet laboratory safety standards
• Test alarms, interlocks, emergency stops, or safety shutdown systems if applicable

6. Final Quality Assurance and Documentation

• Perform extended runtime testing
• Document operational logs, testing results, and any repairs or adjustments made
• Complete a final inspection, thorough cleaning, and packaging for delivery

Trusted Quality from American Instrument Exchange

With over 50 years of experience in laboratory equipment refurbishment, American Instrument Exchange is committed to delivering certified, lab-ready instruments backed by expert testing. Our testing protocols ensure that each piece of equipment—regardless of type—is safe, accurate, and dependable from day one.

Whether you're equipping a startup lab or expanding a high-throughput facility, you can count on our refurbished laboratory equipment to perform with precision and reliability.

Refurbishment Protocol for Used Laboratory Equipment from American Instrument Exchange

At American Instrument Exchange, every piece of used laboratory equipment we offer undergoes a multi-step refurbishment process. Whether it's an analytical balance, centrifuge, freezer, oven, or any other essential lab instrument, our goal is to restore each unit to peak performance—ensuring accuracy, safety, and long-term reliability in scientific, clinical, industrial, and academic environments.

Why Choose Refurbished Lab Equipment from American Instrument Exchange?

• Thoroughly tested for performance, precision, and safety
• Backed by a warranty
• A cost-effective alternative to new equipment
• Environmentally sustainable through equipment reuse and waste reduction
• Serviced by expert technicians with decades of laboratory equipment experience

Step-by-Step Refurbishment Protocol

Every instrument and system refurbished at American Instrument Exchange follows a detailed, industry-aligned process:

1. Initial Intake & Inspection

• Complete visual and structural inspection for cosmetic damage, wear, or corrosion
• Mechanical assessment of hinges, seals, fasteners, motors, and moving parts
• Missing components and damaged items are documented for repair or replacement

2. Cleaning and Decontamination

• Full internal and external cleaning using non-abrasive, lab-safe solutions
• Removal of biological, chemical, or particulate contamination
• Disassembly and cleaning of removable parts such as trays, shelves, and filters

3. Mechanical and Electrical Repair

• Replacement or repair of worn or broken mechanical parts
• Evaluation and servicing of control panels, sensors, switches, and displays
• Testing and repair of electrical wiring, fuses, circuit boards, and power supplies

4. Functional System Testing

• Assessment of all major functions specific to the equipment type (e.g., speed, temperature, force, weight, timing)
• Operation of control interfaces, programming menus, and digital displays
• Verification of stabilization time, responsiveness, and user input reliability

5. Testing and Performance Verification

• Testing of internal sensors, controllers, and measurement systems using certified tools
• Multi-point testing to ensure repeatability, accuracy, and performance consistency
• Confirmation of user-defined setpoints, timing sequences, or programmable cycles

6. Safety and Compliance Checks

• Testing of safety interlocks, alarms, and over-limit protection systems (as applicable)
• Electrical safety inspections, including grounding and insulation verification

7. Final Quality Assurance and Documentation

• Full operational testing under simulated lab conditions
• Completion of performance benchmarks, testing results, and repair logs
• Final cleaning and visual inspection

Trust the Experts at American Instrument Exchange

With over 50 years of experience in the laboratory equipment industry, American Instrument Exchange is a trusted leader in high-quality refurbished lab instruments. Our refurbishment protocols ensure that every piece of equipment we sell is lab-ready—offering the precision, performance, and durability your team can count on.

Whether you’re outfitting a new lab or expanding an existing operation, choose American Instrument Exchange for tested, warrantied, and cost-effective laboratory equipment.

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.