The Thermo Revco REC4504A High-Performance Chromatography Refrigerator is a large-capacity laboratory refrigerator designed specifically for chromatography, protein purification, refrigerated fraction collection, and other applications requiring stable temperature control while accommodating instrumentation inside the refrigerated chamber. With 45.8 cu. ft. of capacity, a 1°C to 8°C operating range, double sliding glass doors, positive forced-air circulation, and two 2-inch access ports, the REC4504A provides a practical refrigerated workspace for demanding research and analytical workflows.
Built around Thermo Revco's high-performance refrigeration platform, the REC4504A combines industrial-quality cabinet construction with a microprocessor control system and heavy-duty refrigeration components designed for scientific, clinical, and research environments. Its wide interior provides ample room for chromatography apparatus, collection vessels, columns, buffers, reagents, and temperature-sensitive samples.
This used Thermo Revco chromatography refrigerator is tested and reconditioned by American Instrument Exchange prior to shipment and includes a 90-day warranty.
Key Features
45.8 cu. ft. capacity for chromatography systems, samples, reagents, and laboratory materials
1°C to 8°C adjustable temperature range, factory preset at 4°C
Double sliding glass doors for visibility and convenient access
Positive forced-air circulation designed to maintain temperature uniformity throughout the cabinet
Two 2-inch diameter access ports for chromatography tubing, cables, probes, and instrumentation
Microprocessor-based temperature control system
Large digital temperature display for at-a-glance monitoring
Four adjustable epoxy-coated open-wire shelves
Audible and visual temperature and power-failure alarms
Controller battery backup system
Key-operated master switch for setpoint security
Demand-based defrost system
Automatic condensate removal
Dual-wheel casters for positioning
90-day warranty from American Instrument Exchange
Overview
The Thermo Revco REC4504A was designed for laboratories that need more than conventional refrigerated sample storage. Chromatography procedures frequently require columns, collection vessels, tubing, buffers, and other components to remain under controlled refrigerated conditions throughout a separation or purification process. The REC4504A provides a large temperature-controlled workspace specifically suited to these requirements.
Its 45.8 cu. ft. chamber provides enough space for substantial chromatography setups while retaining shelving for reagents, samples, buffers, and related materials. Four adjustable epoxy-coated open-wire shelves allow the interior to be reconfigured according to the needs of the laboratory.
Two 2-inch diameter access ports with hinged covers allow tubing, cables, probes, and other connections to pass between equipment inside and outside the refrigerated chamber. This provides a cleaner and more practical installation than routing connections through the door opening and helps maintain the integrity of the refrigerated environment.
The REC4504A also uses double sliding glass doors, allowing researchers to observe chromatography equipment, collection vessels, and stored materials without opening the refrigerator. When physical access is required, users can open only the necessary portion of the cabinet rather than exposing the entire chamber to ambient laboratory conditions.
For laboratories performing chromatography regularly, these features make the REC4504A considerably more functional than a conventional glass-door laboratory refrigerator.
Common Applications
The Thermo Revco REC4504A is well suited for protein purification, column chromatography, refrigerated fraction collection, chromatography system operation, buffer and reagent storage, sample preparation, and other temperature-sensitive research procedures.
The large refrigerated chamber can accommodate chromatography columns, fraction collectors, collection vessels, tubing assemblies, and related components while maintaining the controlled environment required for temperature-sensitive samples.
Outside of active chromatography procedures, the REC4504A can also serve as a high-capacity laboratory refrigerator for proteins, enzymes, reagents, buffers, media, standards, controls, biological samples, and other materials requiring storage between 1°C and 8°C.
Ideal Laboratory Types
The Thermo Revco REC4504A is particularly well suited for biotechnology companies, pharmaceutical research laboratories, protein purification facilities, academic research laboratories, biochemistry laboratories, analytical laboratories, life science facilities, and industrial R&D environments.
Its 45.8 cu. ft. capacity makes it especially useful for laboratories with larger chromatography setups, substantial reagent inventories, or multiple researchers sharing refrigerated equipment.
The combination of a large chamber and adjustable shelving also gives laboratories flexibility to transition between active chromatography workflows and routine refrigerated storage as research requirements change.
Performance & Temperature Uniformity
The REC4504A provides an adjustable 1°C to 8°C operating range and is factory configured around a 4°C setpoint, making it suitable for many common laboratory refrigeration and chromatography applications.
A positive forced-air circulation system distributes conditioned air throughout the chamber to promote temperature uniformity across shelf levels. This is particularly important in a large-capacity refrigerator, where temperature stratification can otherwise create meaningful differences between storage locations.
The microprocessor control system provides digital temperature monitoring and incorporates audible and visual warnings for temperature deviations and power failures. Factory alarm thresholds are designed to alert users when cabinet temperatures move substantially above or below the normal operating setpoint.
A controller battery backup system helps maintain alarm functionality during power interruptions.
The refrigerator also uses a demand-based defrost system. Rather than relying solely on a fixed defrost timer, the system initiates defrost as required, helping minimize frost buildup while maintaining evaporator coil efficiency.
Sample Storage Recommendations
For routine refrigerated storage, samples, reagents, and containers should be positioned to permit adequate airflow throughout the cabinet. The REC4504A's open-wire shelving supports air circulation, but excessive loading or blocking interior air passages can still affect temperature distribution.
When using the refrigerator for chromatography, adequate space should be maintained around columns, collection vessels, fraction collectors, tubing, and other components. Avoid configuring equipment in a way that obstructs major airflow paths.
The two 2-inch access ports should be used whenever practical for tubing, cables, monitoring probes, or other external connections rather than routing these components through the door opening.
For critical samples, high-value biological materials, or regulated applications, an independent temperature monitoring or data-logging system should be considered in addition to the refrigerator's onboard temperature controls and alarms.
Key Specifications
Specification
Thermo Revco REC4504A
Manufacturer
Thermo Scientific / Revco
Model
REC4504A
Product Type
High-performance chromatography refrigerator
Configuration
Upright, double-door
Door Type
Double sliding glass
Capacity
45.8 cu. ft.
Temperature Range
1°C to 8°C
Factory Setpoint
4°C
Exterior Dimensions
56.5"W × 34.5"D × 79.1"H
Interior Dimensions
52.5"W × 26"D × 58"H
Temperature Control
Microprocessor
Air Circulation
Positive forced-air
Shelves
4 adjustable epoxy-coated open-wire shelves
Access Ports
2 × 2" diameter
Defrost
Automatic, demand-based
Temperature Display
Digital
Alarm Functions
Temperature deviation and power failure
Controller Battery Backup
Yes
Master Switch
Key-operated ON/OFF/ALARM ON
Mobility
Dual-wheel casters
Electrical Requirements
115V, 60 Hz
Plug Configuration
NEMA 5-15
Weight / Shipping Weight
Approximately 670 lbs.
Warranty
90 days from American Instrument Exchange
Energy Efficiency & Operating Costs
The Thermo Revco REC4504A was engineered as a high-performance scientific refrigerator, with refrigeration components selected to support demanding laboratory use and frequent access.
Its demand-based defrost system helps limit unnecessary defrost cycles by initiating defrost according to system conditions rather than relying exclusively on fixed intervals. This approach helps control frost accumulation while maintaining evaporator coil performance.
The sliding glass doors can also reduce unnecessary temperature recovery by allowing users to identify samples and monitor chromatography processes before opening the refrigerator. When access is necessary, only a portion of the cabinet needs to be opened.
As an older-generation high-performance laboratory refrigerator, the REC4504A should not be expected to match the energy consumption of the newest high-efficiency laboratory refrigeration platforms. For laboratories prioritizing capacity, chromatography functionality, and acquisition cost, however, a properly operating refurbished REC4504A can represent a practical alternative to purchasing a new large-capacity chromatography refrigerator.
Actual energy consumption will depend on laboratory temperature, refrigerator setpoint, sample loading, frequency of door openings, and operating conditions.
Refurbishment & Testing
American Instrument Exchange technicians inspect, clean, test, and recondition used Thermo Revco chromatography refrigerators prior to shipment.
Temperature performance is verified using a calibrated digital data logger to confirm the accuracy of the refrigerator's controls and temperature readout. The refrigeration system, compressor operation, microprocessor controls, alarms, door hardware, gaskets, shelving, access ports, and other major components are inspected for condition and proper operation.
Hardware and components are repaired or replaced as necessary during the refurbishment process, and each refrigerator is thoroughly cleaned prior to shipment.
This Thermo Revco REC4504A includes a 90-day warranty from American Instrument Exchange.
Shipping & Installation
The REC4504A is a large, heavy laboratory refrigerator with exterior dimensions of approximately 56.5"W × 34.5"D × 79.1"H and a shipping weight of approximately 670 lbs.
Laboratories should confirm that loading docks, elevators, corridors, doorways, and other access points can accommodate the refrigerator before delivery. Because of its width and weight, appropriate material-handling equipment should be available for unloading and final placement.
The refrigerator should be installed on a level surface with adequate ventilation clearance and connected to an appropriate 115V, 60 Hz electrical supply with a NEMA 5-15 receptacle.
After installation, allow the refrigerator to reach and stabilize at the desired operating temperature before loading temperature-sensitive materials or beginning chromatography procedures.
Related Laboratory Equipment
American Instrument Exchange carries a broad selection of laboratory refrigerators, including chromatography refrigerators, glass-door refrigerators, pharmaceutical refrigerators, and general-purpose laboratory refrigeration systems. Laboratories requiring lower-temperature storage can also choose from laboratory freezers and ultra-low temperature freezers.
For chromatography, protein purification, and sample-processing laboratories, American Instrument Exchange also offers complementary equipment including refrigerated centrifuges, high-speed centrifuges, balances, water baths, shakers, incubators, and other refurbished laboratory equipment.
Frequently Asked Questions
What makes the Thermo Revco REC4504A a chromatography refrigerator?
The REC4504A is specifically configured to accommodate chromatography workflows inside a refrigerated chamber. Its 45.8 cu. ft. interior, double sliding glass doors, adjustable shelving, and two 2-inch access ports provide space and connectivity for chromatography columns, tubing, collection vessels, monitoring probes, and associated equipment.
What is the temperature range of the Thermo REC4504A?
The REC4504A provides an adjustable temperature range of 1°C to 8°C and is factory preset to approximately 4°C, a common operating temperature for refrigerated laboratory and chromatography applications.
How do the access ports help with chromatography applications?
The refrigerator includes two 2-inch diameter access ports that allow tubing, cables, probes, and other connections to pass between the refrigerated chamber and external instrumentation. This eliminates the need to route many connections through the door opening and helps preserve the chamber environment.
Why does the REC4504A use forced-air circulation?
Positive forced-air circulation helps distribute refrigerated air throughout the large chamber, promoting consistent temperatures across different shelf levels. This is especially important when the refrigerator contains chromatography equipment, large containers, or substantial quantities of stored materials.
Can the REC4504A be used as a general-purpose laboratory refrigerator?
Yes. Although designed for chromatography, the 45.8 cu. ft. capacity and 1°C to 8°C operating range also make the REC4504A suitable for compatible reagents, buffers, proteins, enzymes, media, biological samples, standards, controls, and other refrigerated laboratory materials.
What are the advantages of the sliding glass doors?
The glass doors allow researchers to inspect samples, chromatography equipment, and collection vessels without opening the refrigerator. The sliding configuration also allows access to one section of the chamber without exposing the entire refrigerated interior and eliminates the clearance requirements associated with large outward-swinging doors.
Is the Thermo Revco REC4504A still a good choice for a laboratory?
For laboratories that need a large-capacity chromatography refrigerator at a lower acquisition cost than comparable new equipment, a properly refurbished REC4504A can remain a useful option. Its large chamber, forced-air circulation, access ports, glass doors, and dedicated chromatography configuration provide functionality that can be expensive to replicate with a new refrigerator.
How is the REC4504A tested before shipment?
American Instrument Exchange tests refrigerator performance using a calibrated digital data logger to verify temperature control and readout accuracy. Major refrigeration, electrical, control, alarm, door, and cabinet components are inspected, and hardware or parts are replaced as necessary before the refrigerator is cleaned and prepared for shipment.
Does this Thermo Revco chromatography refrigerator include a warranty?
Yes. The refurbished Thermo Revco REC4504A includes a 90-day warranty from American Instrument Exchange.
CLICK HEREto see the Thermo Revco REC4504A high-performance chromatography refrigerator on our YouTube channel
Testing Procedures for Used and Refurbished Laboratory Refrigerators Ensure Temperature Stability and Cold Storage Accuracy
Used and refurbished laboratory refrigerators from American Instrument Exchange are thoroughly tested to ensure reliable cold storage performance, temperature accuracy, and compliance with laboratory safety and storage standards. Each unit undergoes a detailed inspection and functional verification to meet the requirements of clinical, pharmaceutical, research, and industrial labs.
Why Testing Used Laboratory Refrigerators Is Essential
Before a laboratory refrigerator is reintroduced into any laboratory setting, it must be carefully tested for:
• Temperature uniformity and stability
• Cooling system integrity and compressor function
• Door seal performance and insulation effectiveness
• Electrical safety and compliance with lab standards
Thorough testing minimizes the risk of temperature excursions, product loss, and system failures—especially critical for storing reagents, vaccines, biological samples, pharmaceuticals, and temperature-sensitive materials.
Our structured testing protocol ensures refurbished lab refrigerators deliver consistent, dependable performance across all makes and models.
Key Testing Procedures for Refurbished and Used Laboratory Refrigerators
1. Initial Visual Inspection
• Check exterior surfaces, hinges, and door gaskets for wear, corrosion, or damage
• Inspect power cords, plugs, and control panels for fraying or visible defects
• Verify that shelves, racks, and internal compartments are present and functional
2. Functional Testing
• Power on the refrigerator and verify that display screens, alarms, and controls function properly
• Test door latches and sealing mechanisms to ensure secure closure and insulation
• Run preliminary temperature cycles to observe startup behavior and cooling response
3. Temperature and Stability Testing
• Test internal temperature sensors and controllers using thermometers/probes
• Monitor temperature at multiple points within the chamber over an extended period
• Verify accuracy across user-defined setpoints (e.g., +4°C, +2°C to +8°C range)
4. Cooling System and Compressor Evaluation
• Test compressor startup, cycling, and operating noise levels
• Inspect condenser coils and fans for proper function and cleanliness
• Check refrigerant pressure (if applicable) and confirm there are no leaks or system inefficiencies
5. Electrical Safety and Compliance Checks
• Ensure all internal and external electrical components are properly grounded
• Perform insulation resistance and leakage current tests 6. Final Quality Assurance Checklist
• Run full operational tests over a 24-hour period
• Document temperature logs, control responsiveness, and system performance
• Complete a detailed service report
All refurbished laboratory refrigerators from American Instrument Exchange are backed by our rigorous testing standards and quality commitment. From vaccine storage to reagent preservation, you can count on consistent cold storage performance from day one.
Repair and Refurbishment Protocol for Used Laboratory Refrigerators Cold Storage Performance from American Instrument Exchange
At American Instrument Exchange, every used laboratory refrigerator we offer is subjected to a comprehensive repair and refurbishment protocol. Whether it’s a general-purpose lab refrigerator, pharmaceutical-grade unit, or undercounter model, our goal is to restore each system to peak performance—ensuring consistent temperature control and reliable to laboratory storage standards.
Why Choose a Refurbished Laboratory Refrigerator 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 refrigerator 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, lab-safe 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 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., +2°C to +8°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 under real-world conditions
• Final cleaning, inspection, and performance validation
• Detailed service report with temperature logs, repair notes, and certification of refurbishment
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, reagents, and research materials 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.
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.
