All products ship from our 30,000 sq. ft. Haverhill, MA warehouse
Sheldon Manufacturing 2440 CO₂ Incubator
Large-scale cell culture applications require an incubator capable of maintaining precise temperature and CO₂ conditions across a spacious chamber while supporting continuous laboratory operation. The Sheldon Manufacturing 2440 CO₂ Incubator (now designated as the SHEL LAB SCO40) is a high-capacity reach-in incubator designed for laboratories performing large-volume cell culture, tissue engineering, pharmaceutical research, and biotechnology applications. With its 39.5 cubic foot (1,118-liter) chamber, microprocessor-controlled environmental system, and durable stainless steel interior, the Sheldon 2440 provides the stable incubation environment required for demanding research and production workflows.
Designed for long-term reliability and uniform environmental performance, the Sheldon 2440 combines gentle forced-air circulation, digital CO₂ control, and precise temperature regulation to create optimal growth conditions for sensitive cell cultures. Purchasing a refurbished Sheldon Manufacturing 2440 from American Instrument Exchange allows laboratories to obtain a premium-capacity CO₂ incubator at significant savings compared with purchasing new equipment while maintaining the environmental performance expected for modern biological research.
Sheldon Manufacturing 2440 CO₂ Incubator Key Features
39.5 cu. ft. (1,118 L) chamber capacity
Temperature range from ambient +8°C to 60°C
Digital microprocessor temperature control
Digital CO₂ control system
Temperature stability of ±0.1°C
Temperature uniformity of ±0.5°C
Large reach-in cabinet design
Gentle forced-air circulation
300-series stainless steel chamber
Adjustable stainless steel shelving
Easy-to-clean chamber interior
90-day warranty from American Instrument Exchange
Designed for High-Capacity Cell Culture
The Sheldon Manufacturing 2440 was developed for laboratories requiring substantially greater incubation capacity than standard benchtop CO₂ incubators. Its expansive 1,118-liter chamber allows researchers to incubate large numbers of culture vessels simultaneously while maintaining stable environmental conditions throughout the workspace. This makes the incubator particularly well suited for high-throughput laboratories, production-scale tissue culture, contract research organizations, and facilities supporting multiple research groups.
Digital microprocessor controls continuously regulate chamber temperature and CO₂ concentration to provide consistent environmental conditions for sensitive biological samples. Gentle forced-air circulation promotes uniform temperature distribution throughout the chamber while minimizing localized hot or cold spots, helping improve culture consistency across multiple shelves.
Common Applications
The Sheldon Manufacturing 2440 CO₂ Incubator is commonly used for:
The Sheldon Manufacturing 2440 is an excellent choice for pharmaceutical manufacturers, biotechnology companies, university research laboratories, clinical research organizations, government laboratories, regenerative medicine programs, and biomanufacturing facilities requiring large-capacity incubation. Its spacious reach-in design makes it especially valuable for laboratories that routinely culture large numbers of flasks, plates, and cell culture vessels while maintaining precise environmental control across extended incubation periods.
Reliable Temperature Stability for Large-Scale Cell Culture
Maintaining uniform environmental conditions becomes increasingly important as incubator size increases. The Sheldon Manufacturing 2440 utilizes a microprocessor-controlled heating system and gentle forced-air circulation to maintain stable temperatures throughout its large chamber. Digital CO₂ regulation helps provide consistent atmospheric conditions that support healthy cell growth, while the durable 300-series stainless steel interior resists corrosion and simplifies routine cleaning between research projects.
With temperature stability of ±0.1°C, chamber uniformity of ±0.5°C, and a large 39.5 cubic foot capacity, the Sheldon 2440 is well suited for laboratories seeking dependable performance for long-term cell culture studies, production workflows, and high-volume biological research.
Typical Cell Types, Culture Vessels, and Research Applications
The 39.5 cubic foot (1,118-liter) chamber of the Sheldon Manufacturing 2440 provides ample capacity for laboratories supporting large-scale cell culture, production workflows, and multiple concurrent research projects. The spacious interior accommodates T-flasks, roller bottles, cell culture dishes, multiwell plates, spinner flasks, media bottles, bioreactor support vessels, and other laboratory containers commonly used in mammalian cell culture and biotechnology research.
Multiple adjustable stainless steel shelves allow users to configure the chamber for a variety of vessel sizes while maintaining consistent airflow throughout the incubator. Proper spacing between culture vessels helps ensure uniform temperature and CO₂ distribution, promoting reproducible culture conditions across every shelf during extended incubation periods.
Energy Efficiency and Operating Costs
Although designed as a large-capacity reach-in incubator, the Sheldon Manufacturing 2440 incorporates efficient insulation, microprocessor-based environmental controls, and gentle forced-air circulation to maintain stable chamber conditions while minimizing unnecessary heating cycles. Digital monitoring continuously adjusts chamber conditions, allowing the incubator to recover quickly following door openings without excessive energy consumption.
Routine preventative maintenance—including cleaning the chamber interior, inspecting door gaskets, verifying CO₂ calibration, and maintaining the air circulation system—helps maximize performance while extending equipment life. Maintaining clean airflow paths and regularly monitoring CO₂ supply pressure also contributes to consistent environmental conditions and dependable long-term operation.
Specifications are believed to be accurate but may vary depending on production date or factory-installed options. Please verify all specifications prior to purchase.
Is the Sheldon Manufacturing 2440 the same as the SHEL LAB SCO40?
Yes. The Sheldon Manufacturing 2440 is the legacy model designation for what is now marketed as the SHEL LAB SCO40. The two models share the same chamber size, operating characteristics, and overall design.
What types of cell culture applications is this incubator designed for?
The Sheldon 2440 is ideal for mammalian cell culture, stem cell research, tissue engineering, cancer biology, immunology, regenerative medicine, vaccine development, biopharmaceutical production, and other research requiring stable CO₂ incubation conditions.
Why choose a reach-in incubator instead of a standard laboratory incubator?
Reach-in incubators provide significantly greater chamber capacity than benchtop models, allowing laboratories to incubate large numbers of culture vessels simultaneously while maintaining consistent environmental conditions throughout the chamber.
What types of culture vessels fit inside the chamber?
The spacious chamber is designed to accommodate T-flasks, roller bottles, culture dishes, multiwell plates, media bottles, spinner flasks, and other laboratory containers commonly used in biological research and production environments.
Is the stainless steel chamber easy to maintain?
Yes. The 300-series stainless steel interior resists corrosion, withstands routine laboratory cleaning procedures, and provides a durable surface for long-term operation.
What laboratories commonly use the Sheldon Manufacturing 2440?
The incubator is widely used by pharmaceutical manufacturers, biotechnology companies, academic research institutions, contract research organizations, government laboratories, clinical research facilities, and biomanufacturing operations.
Can this incubator support high-throughput research?
Yes. Its 39.5 cubic foot chamber, multiple adjustable shelves, and stable environmental controls make it an excellent choice for laboratories processing large numbers of cultures or supporting multiple research programs simultaneously.
Why purchase a refurbished Sheldon Manufacturing 2440 from American Instrument Exchange?
Purchasing a refurbished Sheldon Manufacturing 2440 CO₂ Incubator from American Instrument Exchange provides laboratories with a high-capacity incubation solution at substantial savings compared with purchasing new equipment. Featuring a 39.5 cubic foot chamber, digital microprocessor controls, precise temperature regulation, digital CO₂ control, and a durable 300-series stainless steel interior, the Sheldon 2440 is well suited for large-scale cell culture, pharmaceutical research, biotechnology, and biomanufacturing applications. Every unit is inspected and tested prior to shipment and includes a 90-day warranty for added confidence.
Click Hereto see the Sheldon CO2 incubator on the American Instrument Exchange YouTube channel.
Testing Procedures for Used and Refurbished CO₂ Laboratory Incubators Ensure Atmosphere Control, Temperature Accuracy, and Regulatory Compliance
At American Instrument Exchange, all used and refurbished CO₂ incubators undergo a multi-step testing and calibration process. These procedures are designed to ensure precise environmental control, microbial safety, and long-term reliability—critical for cell culture, IVF, tissue engineering, and pharmaceutical R&D applications.
Why Testing Used CO₂ Incubators Is Essential
Before a CO₂ incubator is redeployed into a laboratory, it must be thoroughly tested for:
• CO₂ sensor accuracy and gas concentration control
• Temperature uniformity and stability
• Humidity system function
• HEPA filtration and contamination control
• Electrical and safety compliance
Proper testing ensures viable growth environments for sensitive cultures and prevents costly contamination or culture loss in high-stakes lab environments.
Our standardized refurbishment protocol ensures used CO₂ incubators deliver laboratory grade performance at a fraction of the cost of comparable new units.
Key Testing Procedures for Refurbished and Used CO₂ Incubators
1. Initial Visual Inspection
• Inspect the exterior for corrosion, dents, or door alignment issues
• Check door gasket integrity and hinge function
• Verify presence and condition of internal shelves, water pans, and humidity trays
• Examine power cords, gas connectors, and display interfaces for signs of wear
2. Functional Startup Test
• Power on the unit and check for successful system boot
• Verify touchscreen or keypad response, and test all user-programmable settings
• Check door alarms and temperature/CO₂ alerts
3. Temperature Control and Uniformity Testing
• Use temperature probes to verify internal temperature accuracy
• Monitor temperature uniformity across multiple chamber zones
• Ensure fast recovery times after door openings
4. CO₂ Sensor Testing and Gas Delivery System Test
• Test accuracy of infrared (IR) or thermal conductivity (TC) CO₂ sensors using certified reference gas and probes/Fyrite analyzers
• Test inlet pressure regulators and gas flow control systems
• Confirm stable CO₂ levels at multiple setpoints (e.g., 5%, 10%)
• Check for proper mixing and diffusion throughout the chamber
5. Humidity and Contamination Control Testing
• Test humidity generation (via water pan or active system) and verify chamber RH levels
• Inspect HEPA filters (if equipped) and airflow systems for particulate control
• Sanitize interior and confirm antimicrobial coatings or copper components are intact
6. Electrical Safety and Compliance Check
• Ensure proper grounding and insulation of all electrical components
• Perform leak and continuity testing
• Verify the unit meets electrical safety standards for laboratory environments
7. Final Quality Assurance and Performance Validation
• Run a 24-hour performance cycle with monitored CO₂, temperature, and RH
• Document data and final readings
• Complete service report
All refurbished CO₂ incubators sold by American Instrument Exchange are tested to meet the performance demands of today's advanced laboratory workflows—ensuring safety, precision, and peace of mind with every unit.
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.
