A white, upright Thermo Scientific Precision refrigerated incubator featuring a control panel on top, standing in front of an American Instrument Exchange backdrop.

Thermo Scientific Precision PR505755R Refrigerated Incubator

Product Code : SKU 3142GG INC

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Thermo Scientific Precision PR505755R Refrigerated Incubator

Many laboratory procedures require temperatures below ambient while maintaining the precision and stability expected of a research-grade incubator. Whether performing biochemical oxygen demand (BOD) testing, culturing environmental microorganisms, conducting food quality studies, or evaluating seed germination, laboratories depend on consistent low-temperature incubation to produce accurate and reproducible results. The Thermo Scientific Precision PR505755R Refrigerated Incubator is designed specifically for these applications, combining a spacious 20 cubic foot (566 L) chamber with dependable refrigeration, microprocessor controls, and forced-air air circulation for reliable performance across an operating range of -10°C to +50°C.

Unlike conventional incubators that only provide heating, the PR505755R integrates both refrigeration and heating into a single system, allowing laboratories to maintain stable environmental conditions for a wide variety of microbiological and environmental testing protocols. Its large-capacity chamber accommodates more than 300 standard 300 mL BOD bottles, while features including programmable controls, over- and undertemperature protection, RS-232 communication capability, and corrosion-resistant construction make it an excellent solution for environmental, industrial, and research laboratories. Purchasing a refurbished Thermo Scientific Precision PR505755R from American Instrument Exchange provides an economical alternative to purchasing new while delivering the dependable performance laboratories expect from Thermo Scientific equipment.

Thermo Scientific Precision PR505755R Refrigerated Incubator Key Features

20 cu. ft. (566 L) chamber capacity
Operating temperature range of -10°C to +50°C
Microprocessor temperature controller
Forced-air circulation for excellent chamber uniformity
Holds over 300 standard 300 mL BOD bottles
RTD temperature sensor
Digital temperature display with 0.1°C resolution
High- and low-temperature safety protection
RS-232 communication and recorder outputs
Access port for probes and external instrumentation
Four adjustable shelves included (expandable to six)
Corrosion-resistant aluminum chamber interior
Solid insulated door
115V operation
90-day warranty from American Instrument Exchange

Designed for Refrigerated Laboratory Incubation

Many laboratory protocols require temperatures well below room temperature while maintaining stable environmental conditions throughout extended incubation periods. The PR505755R was engineered to satisfy these requirements by combining precision refrigeration and heating into a single platform. This flexibility allows laboratories to perform refrigerated microbiological studies, BOD testing, environmental analysis, and elevated-temperature incubation without changing equipment.

A microprocessor controller continuously monitors chamber conditions using an RTD temperature sensor while forced-air circulation distributes conditioned air evenly throughout the chamber. This design promotes excellent temperature stability and uniformity across every shelf position, helping ensure that samples receive consistent incubation conditions regardless of their placement inside the chamber.

Common Applications

The Thermo Scientific Precision PR505755R is commonly used for:

Biochemical oxygen demand (BOD) testing
Water and wastewater analysis
Environmental microbiology
Food safety and quality testing
Beverage microbiology
Seed germination studies
Plant physiology research
Entomology
Aquatic organism studies
Pharmaceutical quality control
Industrial quality assurance
Academic microbiology research

Laboratories frequently pair refrigerated incubators like the PR505755R with laboratory refrigerators for media storage, ultralow temperature freezers for long-term sample preservation, biosafety cabinets for aseptic sample preparation, and benchtop centrifuges to support complete microbiology and environmental testing workflows.

Ideal Laboratory Environments

The PR505755R is an excellent choice for municipal water and wastewater laboratories, environmental testing facilities, food and beverage quality control laboratories, agricultural research centers, pharmaceutical quality assurance laboratories, public health laboratories, university microbiology departments, and industrial research organizations. Its large-capacity chamber makes it particularly attractive for laboratories processing high sample volumes or conducting multiple long-term incubation studies simultaneously.

Optimized for High-Volume BOD Testing

One of the defining advantages of the PR505755R is its exceptional capacity for biochemical oxygen demand testing. With room for more than 300 standard 300 mL BOD bottles, laboratories can process large testing batches within a single incubator while maintaining consistent environmental conditions throughout the chamber. This improves workflow efficiency, reduces the need for multiple incubators, and helps ensure comparable incubation conditions across every sample.

The spacious interior is equally well suited for petri dishes, culture bottles, flasks, environmental samples, and other laboratory containers. Four adjustable shelves are supplied as standard, with the option to expand to six shelves as laboratory throughput increases. RS-232 communication capability also allows laboratories to document chamber performance for quality assurance and regulatory compliance.

Performance and Temperature Uniformity

Consistent temperature control is essential for microbiological testing, environmental studies, and quality control applications where even small fluctuations can influence experimental results. The Thermo Scientific Precision PR505755R utilizes a microprocessor-based control system and precision RTD temperature sensor to maintain accurate chamber temperatures throughout the operating range. Combined with a forced-air circulation system, conditioned air is distributed evenly across every shelf position, helping minimize temperature gradients within the chamber.

Unlike passive convection incubators, forced-air circulation allows the PR505755R to recover more quickly following door openings while maintaining excellent temperature uniformity during extended incubation periods. This level of environmental stability is particularly valuable for laboratories conducting long-term BOD testing, microbiological culture work, and environmental monitoring programs where repeatability is critical.

Typical Samples and Culture Applications

The Thermo Scientific Precision PR505755R is designed to support a broad range of refrigerated laboratory applications. Its spacious chamber accommodates standard BOD bottles, petri dishes, Erlenmeyer flasks, culture tubes, media bottles, environmental water samples, food products, plant materials, seed trays, and a variety of laboratory containers used in microbiological and environmental testing.

Researchers commonly use refrigerated incubators such as the PR505755R for bacterial and fungal culture, environmental microbiology, water quality analysis, food safety testing, seed germination, aquatic biology studies, entomology research, and pharmaceutical quality assurance. The wide operating temperature range also provides flexibility for laboratories performing both refrigerated incubation and moderate elevated-temperature protocols within a single instrument.

Thermo Scientific Precision PR505755R Refrigerated Incubator Specifications

Specification	Details
Manufacturer	Thermo Scientific Precision
Model	PR505755R
Chamber Type	Refrigerated Incubator
Chamber Capacity	20 cu. ft. (566 L)
Temperature Range	-10°C to +50°C
Temperature Uniformity	±0.5°C at 37°C
Temperature Sensor	RTD
Temperature Display Resolution	0.1°C
Air Circulation	Forced Air
Interior Material	Corrosion-Resistant Aluminum
Shelves Included	4 Adjustable Shelves
Maximum Shelf Capacity	6 Shelves
BOD Bottle Capacity	Over 300 (300 mL Bottles)
Communications	RS-232 and Recorder Outputs
Access Port	Yes
Interior Dimensions (W × D × H)	20 × 26.5 × 57 in.
Exterior Dimensions (W × D × H)	31 × 34 × 77 in.
Electrical Requirements	115V, 60 Hz
Weight	Contact American Instrument Exchange

Specifications are based on manufacturer documentation. Certain specifications may vary depending on production year and factory-installed options. Please verify installation requirements prior to purchase.

Thermo Scientific Precision PR505755R Refrigerated Incubator Frequently Asked Questions

What is the primary advantage of a refrigerated incubator compared to a standard laboratory incubator?

A refrigerated incubator can maintain temperatures below ambient, allowing laboratories to perform applications such as BOD testing, environmental microbiology, seed germination, and food quality studies that cannot be performed in conventional heated incubators.

How many BOD bottles can the PR505755R hold?

The chamber accommodates more than 300 standard 300 mL BOD bottles, making it an excellent choice for municipal water laboratories, environmental testing facilities, and laboratories processing large testing volumes.

Is the PR505755R suitable for continuous operation?

Yes. The incubator is designed for long-duration laboratory protocols and incorporates a microprocessor controller, forced-air circulation, and temperature safety protection to support continuous operation during extended testing programs.

What types of samples can be incubated in this model?

The PR505755R can be used for environmental water samples, microbiological cultures, food and beverage products, seed germination studies, plant materials, insects, aquatic organisms, pharmaceutical samples, and other materials requiring controlled refrigerated incubation.

Why is forced-air circulation beneficial?

Forced-air circulation promotes even temperature distribution throughout the chamber while improving temperature recovery after the door has been opened. This helps maintain consistent incubation conditions regardless of where samples are placed within the chamber.

Can this incubator be used for applications above room temperature?

Yes. Although designed for refrigerated operation, the PR505755R also functions as a heated incubator with an operating range extending to +50°C, allowing laboratories to perform a wide variety of microbiological and environmental protocols using a single instrument.

Does the PR505755R support laboratory documentation?

Yes. RS-232 communication and recorder outputs allow laboratories to connect the incubator to external monitoring or data collection systems for documentation and quality assurance purposes.

Why purchase a refurbished Thermo Scientific Precision PR505755R from American Instrument Exchange?

A refurbished Thermo Scientific Precision PR505755R from American Instrument Exchange provides a dependable refrigerated incubation platform for microbiology, environmental testing, food quality, agricultural research, and pharmaceutical quality assurance laboratories at a significant savings compared to purchasing new equipment. With its 20 cubic foot chamber, -10°C to +50°C operating range, forced-air circulation, and capacity for more than 300 BOD bottles, the PR505755R is an excellent solution for laboratories requiring precise low-temperature incubation. Every unit is inspected and tested prior to shipment and includes a 90-day warranty for added confidence.

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.

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.