All products ship from our 30,000 sq. ft. Haverhill, MA warehouse
Darwin ST030-AA Stability Refrigerator
Pharmaceutical stability studies, shelf-life testing, and controlled refrigerated storage require environmental conditions that are significantly more precise than those provided by conventional laboratory refrigerators. The Darwin ST030-AA Stability Refrigerator was engineered specifically for laboratories performing regulated stability testing, combining precise temperature control, excellent chamber uniformity, and dependable long-term performance in a large-capacity refrigerated chamber. Designed for pharmaceutical, biotechnology, clinical, and industrial laboratories, the ST030-AA provides the stable conditions necessary for validated testing protocols and long-term product evaluation.
Featuring a 24 cubic foot (619-liter) chamber, the Darwin ST030-AA maintains temperatures from 1°C to 15°C with excellent stability and uniformity. Its microprocessor PID control system continuously monitors chamber conditions while the mechanical refrigeration system provides reliable cooling for long-duration studies. Purchasing a refurbished Darwin ST030-AA from American Instrument Exchange allows laboratories to obtain high-quality stability testing equipment at substantial savings compared with purchasing new equipment.
Darwin ST030-AA Stability Refrigerator Key Features
24 cu. ft. (619 L) chamber capacity
Temperature range from 1°C to 15°C
Temperature stability of ±0.2°C
Temperature uniformity of ±0.7°C
Digital microprocessor PID controller
Mechanical refrigeration system
Large insulated cabinet for long-term studies
Six adjustable PVC-coated wire shelves
Stainless steel chamber interior
Designed for pharmaceutical stability testing
115 V, 60 Hz operation
90-day warranty from American Instrument Exchange
Designed for Pharmaceutical Stability Testing
The Darwin ST030-AA was developed specifically for laboratories requiring highly stable refrigerated environments for long-term product evaluation and regulatory testing. Its 619-liter chamber provides generous storage capacity for pharmaceutical products, biologics, packaged materials, research samples, and quality assurance studies while maintaining consistent refrigerated temperatures throughout the cabinet.
Unlike standard laboratory refrigerators designed primarily for sample storage, the ST030-AA is engineered to deliver exceptional temperature consistency over extended testing periods. The digital PID controller continuously regulates chamber conditions, while insulated cabinet construction and uniform airflow help minimize temperature variation throughout the interior, supporting repeatable stability studies and environmental testing applications.
Common Applications
The Darwin ST030-AA Stability Refrigerator is commonly used for:
Pharmaceutical stability studies
ICH stability testing
Shelf-life evaluation
Product conditioning
Quality assurance testing
Controlled refrigerated storage
Biotechnology research
Clinical laboratory studies
Medical device validation
Food and beverage testing
Agricultural research
Industrial environmental testing
Many laboratories pair the Darwin ST030-AA with CO₂ incubators for cell culture applications, ultra-low freezers for long-term sample preservation, biosafety cabinets for sterile sample preparation, and centrifuges for sample processing prior to stability testing.
Ideal Laboratory Environments
The Darwin ST030-AA is ideally suited for pharmaceutical manufacturers, biotechnology companies, contract testing laboratories, universities, medical device manufacturers, food and beverage laboratories, clinical research organizations, and quality assurance departments performing long-term refrigerated stability studies. Its large-capacity chamber and highly stable operating conditions make it particularly valuable for laboratories working under FDA, USP, ICH, or other regulated testing protocols.
Precision Refrigerated Storage for Long-Term Stability Studies
The Darwin ST030-AA combines precise refrigerated temperature control with excellent chamber uniformity to support demanding laboratory applications. Operating between 1°C and 15°C, the chamber provides an ideal environment for stability testing without exposing samples to freezing temperatures. The digital PID controller maintains ±0.2°C temperature stability, while carefully engineered airflow promotes ±0.7°C chamber uniformity, helping laboratories achieve accurate, repeatable results throughout extended testing cycles. Combined with its spacious 24 cubic foot interior and durable laboratory construction, the ST030-AA is an excellent choice for organizations requiring dependable refrigerated environmental control.
Typical Samples and Stability Testing Applications
The 619-liter (24 cubic foot) chamber of the Darwin ST030-AA provides generous capacity for laboratories performing long-term refrigerated stability studies, environmental conditioning, and regulated product storage. Its spacious interior is ideal for pharmaceutical products, biologics, vaccines, medical devices, packaging materials, nutraceuticals, food and beverage samples, agricultural specimens, and research materials requiring controlled refrigerated conditions.
The chamber includes six adjustable PVC-coated wire shelves, allowing laboratories to configure the interior for a variety of product sizes while maintaining excellent airflow throughout the cabinet. Proper spacing between samples promotes uniform temperature distribution and helps ensure consistent environmental conditions during extended testing protocols, improving the repeatability and reliability of stability studies.
Energy Efficiency and Operating Costs
The Darwin ST030-AA was engineered for continuous operation while maintaining precise refrigerated conditions with efficient energy use. Its insulated cabinet, digital PID controller, and mechanical refrigeration system work together to minimize temperature fluctuations while reducing unnecessary compressor cycling during long-term operation.
Operating within a refrigerated range of 1°C to 15°C, the ST030-AA offers an energy-efficient alternative to freezer storage for applications that require controlled cooling without subzero temperatures. Routine maintenance, including condenser cleaning, door gasket inspection, and periodic calibration verification, helps maximize performance while extending the life of the refrigeration system.
Darwin ST030-AA Stability Refrigerator Key Specifications
Specification
Details
Manufacturer
Darwin Chambers
Model
ST030-AA
Chamber Type
Stability Refrigerator
Chamber Capacity
619 L (24 cu. ft.)
Temperature Range
1°C to 15°C
Temperature Stability
±0.2°C
Temperature Uniformity
±0.7°C
Temperature Control
Digital Microprocessor PID Controller
Cooling System
Mechanical Refrigeration
Chamber Material
Stainless Steel
Shelves Included
6 adjustable PVC-coated wire shelves
Interior Dimensions
22.5" W × 29" D × 58.5" H
Exterior Dimensions
27.75" W × 35.81" D × 80.5" H
Electrical Requirements
115 V, 60 Hz
Specifications are believed to be accurate but may vary depending on production date or factory-installed options. Please verify all specifications prior to purchase.
Darwin ST030-AA Stability Refrigerator Frequently Asked Questions
What is the Darwin ST030-AA designed for?
The Darwin ST030-AA is designed for pharmaceutical stability studies, ICH testing, product conditioning, quality assurance, and other laboratory applications requiring precise refrigerated environmental control.
How is a stability refrigerator different from a laboratory refrigerator?
A stability refrigerator is specifically engineered to maintain highly consistent temperatures and chamber uniformity during long-term testing. While a standard laboratory refrigerator is designed primarily for storage, the ST030-AA provides the stability and repeatability required for regulated pharmaceutical and research applications.
What products are commonly stored or tested in the ST030-AA?
The chamber is commonly used for pharmaceutical products, biologics, vaccines, medical devices, nutraceuticals, packaging materials, food and beverage products, agricultural samples, and research materials requiring controlled refrigerated conditions.
Why is temperature uniformity important?
Temperature uniformity helps ensure that every sample within the chamber experiences the same environmental conditions regardless of shelf location. This is especially important for long-term stability studies where consistent exposure is necessary to generate accurate and reproducible data.
Is the chamber suitable for long-term operation?
Yes. The Darwin ST030-AA was designed for continuous laboratory use and is well suited for extended stability studies, environmental conditioning, and long-duration product storage.
What laboratories commonly use the Darwin ST030-AA?
The ST030-AA is widely used by pharmaceutical manufacturers, biotechnology companies, contract testing laboratories, universities, clinical research organizations, food and beverage manufacturers, medical device companies, and industrial quality assurance laboratories.
Can the shelving be adjusted?
Yes. The chamber includes six adjustable PVC-coated wire shelves, allowing laboratories to customize the interior configuration to accommodate a variety of sample sizes and product containers.
Why purchase a refurbished Darwin ST030-AA from American Instrument Exchange?
Purchasing a refurbished Darwin ST030-AA from American Instrument Exchange provides laboratories with a dependable pharmaceutical stability refrigerator at substantial savings compared with purchasing new equipment. Featuring a 24 cubic foot chamber, 1°C to 15°C operating range, ±0.2°C temperature stability, ±0.7°C chamber uniformity, and a digital PID control system, the ST030-AA is an excellent solution for regulated stability studies and controlled refrigerated storage. Every unit is inspected and tested prior to shipment and includes a 90-day warranty for added confidence.
CLICK HERE to see the Darwin Chambers ST030-AA on our YouTube channel
Testing Procedures for Used and Refurbished Laboratory Incubators Ensure Quality and Stability Before Use
Used and refurbished laboratory incubators from American Instrument Exchange are thoroughly tested to ensure optimal performance and temperature stability with laboratory safety standards. Each unit undergoes a detailed inspection and functionality assessment to meet the needs of research, clinical, and industrial labs.
Why Testing Used Laboratory Incubators Is Essential
Before a laboratory incubator is reintroduced into any work environment, it must be tested for:
• Temperature uniformity and accuracy
• Airflow and humidity control (if applicable)
• Door seal integrity and insulation effectiveness
• Electrical and safety system compliance
Comprehensive testing reduces the risk of culture loss, contamination, and equipment failure—especially critical in applications involving cell culture, microbiology, pharmaceutical research, and diagnostics.
Our multi-point testing protocol for used and refurbished incubators ensures reliability, safety, and performance across all models and brands.
Key Testing Procedures for Refurbished and Used Laboratory Incubators
1. Initial Visual Inspection
• Check for cosmetic damage, corrosion, and wear to exterior surfaces, door hinges, and gasket seals
• Inspect power cord, wiring, and display panel for any defects or signs of tampering
• Confirm that shelves, chamber components, and internal fixtures are present and undamaged
2. Functional Testing
• Power on the incubator and verify all display indicators and alarms function correctly
• Test door latch and seal mechanisms for proper closure and insulation
• Run basic temperature cycles to ensure the unit maintains stability over time
3. Temperature Accuracy and Uniformity Tests
• Test internal sensors and controllers using temperature probes
• Measure temperature consistency at multiple chamber locations over several hours
• Confirm that programmable temperature settings respond accurately
4. Airflow and Humidity Control (if applicable)
• Test internal fan operation and airflow distribution
• For humidified incubators, inspect and test humidity reservoirs, sensors, and control systems
• Check for condensation buildup and confirm environmental stability
5. Electrical Safety and Compliance Checks
• Ensure all electrical components are properly grounded
• Perform insulation resistance and leakage current tests
• Verify compliance with current electrical safety standards for laboratory equipment
6. Final Quality Assurance Checklist
• Perform full cycle testing at various temperature setpoints
• Document performance benchmarks and results
All refurbished incubators from American Instrument Exchange are backed by our commitment to quality and precision. With our strict testing procedures, you can rely on your incubator to deliver dependable results from day one.
Repair and Refurbishment Protocol for Used Laboratory Incubators Performance and Quality from American Instrument Exchange
At American Instrument Exchange, every used laboratory incubator we sell goes through a repair and refurbishment protocol. Whether it’s a standard, CO₂, or refrigerated incubator, our goal is to restore each unit to laboratory-level performance—ensuring temperature accuracy, environmental stability, and long-term reliability in your lab.
Why Choose a Refurbished Laboratory Incubator from American Instrument Exchange?
• Fully tested for performance and safety
• Backed by a warranty
• Cost-effective alternative to new equipment
• Environmentally sustainable through reuse and restoration
• Refurbished by expert technicians with decades of lab equipment experience
Step-by-Step Refurbishment Protocol
Every incubator at American Instrument Exchange follows this comprehensive, multi-stage process:
1. Initial Intake & Inspection
• Visual inspection for cosmetic wear, corrosion, dents, or broken components
• Mechanical assessment of door hinges, gaskets, seals, and chamber components
• Document any missing parts or issues requiring repair or replacement
2. Cleaning and Decontamination
• Thorough internal and external cleaning using non-abrasive solutions
• Decontamination/cleaning of surfaces to remove biological, chemical, or particulate residue
• Cleaning of removable parts (e.g., shelves, trays, etc.)
3. Mechanical and Electrical Repair
• Repair or replacement of worn mechanical components such as door latches, fans, hinges, and seals
• Evaluation and repair of control panels, switches, thermostats, and displays
• Inspection and testing of wiring, fuses, relays, and power supplies
4. Environmental Control System Assessment
• For CO₂ incubators: CO₂ sensors, regulators, and gas delivery systems are tested
• For refrigerated incubators: compressors, condensers, and cooling systems are evaluated for performance and leaks
• Fan motors and airflow systems are tested to ensure uniform environmental conditions
5. Temperature and Sensor Testing
• All temperature sensors and controllers are tested using thermometers/probes
• Uniformity and accuracy tested at multiple chamber locations
• For humidified or CO₂ incubators, humidity and CO₂ stability are verified
6. Safety System Testing
• Test of over-temperature protection systems and alarms
• Evaluation of door sensors, safety interlocks, and power failure recovery
7. Final Quality Control and Documentation
• Full performance test run over 24 hours
• Validation of setpoints for temperature, CO₂ (if applicable), and humidity (if applicable)
• Final inspection and cleaning before packaging
• Complete service report
Trust the Experts at American Instrument Exchange
With over 50 years in the lab equipment industry, American Instrument Exchange is a trusted source for high-quality refurbished laboratory incubators. Our proven refurbishment protocol ensures every unit is reliable, accurate, and ready to meet the demands of your lab from day one.
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.
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.
