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PolyScience 6506T Recirculating Chiller
The PolyScience 6506T Recirculating Chiller is a 1/2 HP laboratory cooling system designed to provide reliable closed-loop temperature control for analytical instruments, laboratory equipment, and process applications. With approximately 1,700 W of cooling capacity at 20°C, ±0.1°C temperature stability, and a turbine pump capable of delivering approximately 13.2 L/min at adjustable pressures up to 100 psi, the 6506T combines substantial refrigeration capacity with the ability to circulate coolant through relatively restrictive external systems.
Available used and refurbished from American Instrument Exchange, the PolyScience 6506T is well suited for analytical instrumentation, lasers, condensers, rotary evaporators, reaction systems, vacuum equipment, and other applications requiring continuous heat removal. Its digital controls provide convenient monitoring of temperature, flow, and pressure, while built-in alarms help protect both the chiller and connected equipment. A 90-day warranty is included.
Key Features
PolyScience 6000 Series recirculating chiller
1/2 HP refrigeration system
-10°C to +40°C operating range for this configuration
Approximately ±0.1°C temperature stability
1,700 W cooling capacity at 20°C
1,100 W cooling capacity at 10°C
750 W cooling capacity at 0°C
Turbine circulation pump
Maximum flow approximately 13.2 L/min / 3.5 GPM
Adjustable pump pressure from approximately 20 to 100 psi
1.1 gal / approximately 4.2 L reservoir
One-touch temperature control
Digital temperature and pressure/flow readouts
Audible and visual operating alarms
Adjustable high- and low-temperature limits
Low-flow protection
Temperature display calibration
Closed-loop external equipment cooling
240 V, 50 Hz configuration
Used, refurbished, and tested by American Instrument Exchange
90-day warranty included
Overview
The PolyScience 6506T is part of the manufacturer's 6000 Series of refrigerated recirculating chillers. It is designed to continuously remove heat from externally connected laboratory and process equipment while maintaining controlled coolant temperature and circulation.
With approximately 1.7 kW of cooling capacity at 20°C, the 6506T occupies a useful middle ground between compact laboratory chillers and much larger high-capacity process cooling systems.
The T designation is particularly important when evaluating this model. The 6506T uses a turbine pump capable of generating substantially greater pressure than a conventional centrifugal-pump chiller while still providing approximately 13.2 L/min of maximum flow.
That combination makes the 6506T useful for cooling circuits where tubing, fittings, instrument passages, or other restrictions create significant hydraulic resistance.
The 6000 Series control system also allows users to quickly view coolant temperature, flow, and pressure. Audible and visual alarms monitor operating conditions and can alert users when temperature, flow, pressure, or ambient conditions move outside established limits.
Key Specifications
Specification
Details
Manufacturer
PolyScience
Model
6506T
Series
6000 Series
Equipment Type
Refrigerated recirculating chiller
Compressor
1/2 HP
Temperature Range
-10°C to +40°C for this configuration
Temperature Stability
Approx. ±0.1°C
Cooling Capacity at 20°C
Approx. 1,700 W
Cooling Capacity at 10°C
Approx. 1,100 W
Cooling Capacity at 0°C
Approx. 750 W
Pump Type
Turbine
Maximum Flow Rate
Approx. 13.2 L/min / 3.5 GPM
Pump Pressure
Adjustable, approx. 20–100 psi
Reservoir Capacity
Approx. 1.1 gal / 4.2 L
Display
Digital LED
Temperature Limits
User adjustable
Alarm Functions
Temperature, flow, pressure, ambient temperature
Exterior Dimensions
Approx. 14.5 in. W × 27.7 in. D × 22.7 in. H
Weight
Approx. 181 lb
Electrical Requirements
240 V, 50 Hz
Warranty
90 days
Common Applications
The PolyScience 6506T can be used with a broad range of laboratory and analytical equipment requiring continuous liquid cooling. Typical applications include lasers, ICP systems, GC/MS equipment, FTIR instruments, spectrophotometers, condensers, rotary evaporators, reaction systems, electron microscopes, vacuum equipment, incubator water jackets, and other temperature-sensitive scientific equipment.
Its combination of moderate-to-high flow and elevated pump pressure is particularly useful for equipment with restrictive internal cooling passages or longer external circulation loops.
The 6506T can also provide an alternative to once-through tap-water cooling in compatible applications. Instead of continuously consuming and discharging facility water, the chiller cools and recirculates a controlled volume of heat-transfer fluid.
This can reduce water consumption while providing more consistent coolant temperature, pressure, and flow.
Ideal Laboratory Types
The PolyScience 6506T is well suited for analytical laboratories, biotechnology and pharmaceutical facilities, chemistry laboratories, spectroscopy facilities, materials-science laboratories, laser research groups, industrial R&D facilities, quality-control departments, and academic research laboratories.
It can be particularly valuable when an instrument requires more circulation pressure than a conventional low-pressure centrifugal pump can provide.
Laboratories replacing an existing PolyScience 6000 Series chiller should verify temperature range, pump configuration, electrical service, and cooling requirements because multiple configurations were produced within this product family.
Temperature Control & Stability
The PolyScience 6506T provides approximately ±0.1°C temperature stability and is configured for refrigerated operation down to subambient temperatures.
Cooling capacity varies considerably with coolant temperature. The refrigeration system provides approximately 1,700 W of heat removal at 20°C, approximately 1,100 W at 10°C, and approximately 750 W at 0°C.
This cooling curve is important when sizing the 6506T for a particular application.
For example, an instrument generating a continuous 1 kW heat load would be comfortably within the chiller's nominal capacity at a 20°C coolant setpoint but would consume most of the available refrigeration capacity around 10°C and exceed the stated capacity at 0°C.
For this reason, chiller selection should always consider the required cooling capacity at the actual intended coolant temperature rather than relying only on the maximum 1,700 W rating.
Appropriate heat-transfer fluid should also be selected for subambient operation.
Circulation & Pump Performance
One of the most useful characteristics of the PolyScience 6506T is its turbine circulation pump.
The system provides maximum flow of approximately 3.5 GPM, or 13.2 L/min, at minimal external restriction. Pump pressure can be adjusted within an approximately 20–100 psi range.
This gives the 6506T substantially more pressure capability than many centrifugal-pump recirculating chillers, which commonly provide high flow but considerably lower maximum pressure.
Higher available pressure can be valuable when coolant must pass through narrow internal passages, long tubing runs, restrictive heat exchangers, or other equipment with significant hydraulic resistance.
Maximum flow and maximum pressure do not occur simultaneously. Actual operating flow depends on the resistance of the complete cooling circuit as well as tubing diameter, fittings, fluid viscosity, operating temperature, elevation, and instrument design.
The connected equipment's maximum allowable coolant pressure should always be checked before operation.
Refurbishment & Testing
This used PolyScience 6506T Recirculating Chiller is refurbished and tested by American Instrument Exchange before shipment. Our technicians inspect the refrigeration system, compressor, turbine circulation pump, reservoir, temperature controller, display, alarms, condenser, electrical components, and external fluid connections.
Temperature-controlled equipment is tested using NIST-traceable probes and data loggers. The refrigeration system is operated for extended periods to evaluate cooling performance, temperature regulation, circulation, controller operation, and overall system stability.
The reservoir and accessible fluid-contact components are cleaned and inspected before shipment.
Because pump performance is particularly important with the 6506T, customers with specific flow or pressure requirements are encouraged to provide those requirements before shipment. When practical, American Instrument Exchange can incorporate customer-requested operating conditions into final testing.
A 90-day warranty is included with this refurbished PolyScience recirculating chiller.
Choosing the Right Recirculating Chiller
The PolyScience 6506T is particularly attractive for applications requiring both meaningful refrigeration capacity and relatively high circulation pressure.
Its approximately 1,700 W cooling capacity at 20°C is suitable for many analytical and laboratory instruments, while its turbine pump provides up to approximately 13.2 L/min of flow with adjustable pressure up to approximately 100 psi.
Pump configuration is an important consideration when comparing recirculating chillers. A high-flow, low-pressure centrifugal chiller may be ideal for an unrestricted cooling circuit but perform poorly when connected to equipment with narrow passages or substantial hydraulic resistance.
The turbine-equipped 6506T provides greater pressure capability for these more restrictive applications.
Buyers should also consider coolant temperature, thermal load, electrical service, fluid compatibility, and maximum allowable instrument pressure before choosing a chiller.
American Instrument Exchange can help compare available used and refurbished laboratory chillers based on these requirements.
Related Equipment
American Instrument Exchange stocks a range of laboratory circulators, including PolyScience recirculating chillers, refrigerated/heated bath circulators, immersion circulators, and higher-capacity process chillers. Laboratories using the PolyScience 6506T may also require evaporators and extractors, reactors and fermenters, laboratory water baths, or other refurbished laboratory equipment.
PolyScience 6506T Frequently Asked Questions
What is the cooling capacity of the PolyScience 6506T?
The 6506T provides approximately 1,700 W of cooling at 20°C, 1,100 W at 10°C, and 750 W at 0°C.
What type of pump does the 6506T use?
The PolyScience 6506T uses a turbine pump designed to provide a combination of relatively high flow and elevated pressure.
What is the maximum flow rate of the PolyScience 6506T?
Maximum flow is approximately 3.5 GPM, or 13.2 L/min, under low-restriction conditions.
How much pressure can the 6506T provide?
The turbine pump provides adjustable pressure from approximately 20 to 100 psi. The maximum allowable coolant pressure of the connected instrument should always be verified before operation.
What is the temperature stability of the 6506T?
The PolyScience 6506T provides temperature stability of approximately ±0.1°C under appropriate operating conditions.
Can the PolyScience 6506T replace tap-water cooling?
In many compatible applications, yes. The 6506T provides closed-loop refrigerated cooling that can reduce continuous consumption and discharge of facility water while providing controlled coolant temperature and circulation.
Is the 6506T suitable for lasers or analytical instruments?
Yes. Recirculating chillers in this series were designed for applications including lasers, ICP systems, GC/MS instruments, FTIR equipment, spectrophotometers, condensers, rotary evaporators, and other heat-generating laboratory equipment. Compatibility should be determined from the instrument's temperature, heat-load, flow, and pressure requirements.
Does this refurbished PolyScience 6506T include a warranty?
Yes. This used PolyScience 6506T is refurbished and tested by American Instrument Exchange and includes a 90-day warranty.
CLICK HEREto see the PolyScience 6506T Chiller on our YouTube channel
Testing Procedures for Used and Refurbished Laboratory Equipment
Ensure Accuracy, Safety, and Dependable Performance Across Applications
At American Instrument Exchange, all used and refurbished laboratory equipment undergoes a rigorous, multi-point testing protocol to ensure optimal performance, operational safety, and long-term reliability. Whether the equipment is destined for research, diagnostics, quality control, or production environments, our thorough inspection and testing process is designed to meet the highest standards of laboratory excellence.
Why Testing Used Lab Equipment Is Essential
Before any refurbished laboratory equipment is returned to service, it must be carefully tested to verify:
• Functional integrity and operational performance
• Setpoint accuracy and repeatability (where applicable)
• User interface responsiveness and control features
Proper testing reduces the risk of equipment failure, measurement inaccuracies, or user hazards—helping to ensure consistent results in clinical, academic, biotech, and industrial labs.
Our standardized lab equipment testing procedures are tailored to each equipment type, ensuring every unit meets manufacturer specifications and industry benchmarks.
Key Testing Procedures for Refurbished and Used Laboratory Equipment
1. Initial Visual Inspection
• Examine equipment housing for signs of wear, corrosion, or damage
• Check ports, power cords, and exterior components for tampering or deterioration
• Verify that internal and external parts (racks, shelves, connectors, accessories) are present and undamaged
2. Functional Startup and Operational Testing
• Power on the equipment and verify startup diagnostics
• Confirm functionality of displays, buttons, switches, and control panels
• Run basic functions to confirm proper response and behavior under standard operating conditions
3. Testing and Performance Verification
• Test internal sensors or control systems using industry-standard tools
• Perform operational tests to validate accuracy and consistency
• Verify key performance specifications such as temperature control, timing, speed, or measurement outputs, depending on equipment type
4. Mechanical and Electrical System Testing
• Evaluate motors, pumps, fans, or other moving parts for smooth operation
• Inspect and test wiring, relays, fuses, and circuit boards for safety and reliability
• Test power delivery and grounding compliance
5. Safety and Compliance Checks
• Ensure equipment is grounded and insulated to meet laboratory safety standards
• Test alarms, interlocks, emergency stops, or safety shutdown systems if applicable
6. Final Quality Assurance and Documentation
• Perform extended runtime testing
• Document operational logs, testing results, and any repairs or adjustments made
• Complete a final inspection, thorough cleaning, and packaging for delivery
Trusted Quality from American Instrument Exchange
With over 50 years of experience in laboratory equipment refurbishment, American Instrument Exchange is committed to delivering certified, lab-ready instruments backed by expert testing. Our testing protocols ensure that each piece of equipment—regardless of type—is safe, accurate, and dependable from day one.
Whether you're equipping a startup lab or expanding a high-throughput facility, you can count on our refurbished laboratory equipment to perform with precision and reliability.
Refurbishment Protocol for Used Laboratory Equipment from American Instrument Exchange
At American Instrument Exchange, every piece of used laboratory equipment we offer undergoes a multi-step refurbishment process. Whether it's an analytical balance, centrifuge, freezer, oven, or any other essential lab instrument, our goal is to restore each unit to peak performance—ensuring accuracy, safety, and long-term reliability in scientific, clinical, industrial, and academic environments.
Why Choose Refurbished Lab Equipment from American Instrument Exchange?
• Thoroughly tested for performance, precision, and safety
• Backed by a warranty
• A cost-effective alternative to new equipment
• Environmentally sustainable through equipment reuse and waste reduction
• Serviced by expert technicians with decades of laboratory equipment experience
Step-by-Step Refurbishment Protocol
Every instrument and system refurbished at American Instrument Exchange follows a detailed, industry-aligned process:
1. Initial Intake & Inspection
• Complete visual and structural inspection for cosmetic damage, wear, or corrosion
• Mechanical assessment of hinges, seals, fasteners, motors, and moving parts
• Missing components and damaged items are documented for repair or replacement
2. Cleaning and Decontamination
• Full internal and external cleaning using non-abrasive, lab-safe solutions
• Removal of biological, chemical, or particulate contamination
• Disassembly and cleaning of removable parts such as trays, shelves, and filters
3. Mechanical and Electrical Repair
• Replacement or repair of worn or broken mechanical parts
• Evaluation and servicing of control panels, sensors, switches, and displays
• Testing and repair of electrical wiring, fuses, circuit boards, and power supplies
4. Functional System Testing
• Assessment of all major functions specific to the equipment type (e.g., speed, temperature, force, weight, timing)
• Operation of control interfaces, programming menus, and digital displays
• Verification of stabilization time, responsiveness, and user input reliability
5. Testing and Performance Verification
• Testing of internal sensors, controllers, and measurement systems using certified tools
• Multi-point testing to ensure repeatability, accuracy, and performance consistency
• Confirmation of user-defined setpoints, timing sequences, or programmable cycles
6. Safety and Compliance Checks
• Testing of safety interlocks, alarms, and over-limit protection systems (as applicable)
• Electrical safety inspections, including grounding and insulation verification
7. Final Quality Assurance and Documentation
• Full operational testing under simulated lab conditions
• Completion of performance benchmarks, testing results, and repair logs
• Final cleaning and visual inspection
Trust the Experts at American Instrument Exchange
With over 50 years of experience in the laboratory equipment industry, American Instrument Exchange is a trusted leader in high-quality refurbished lab instruments. Our refurbishment protocols ensure that every piece of equipment we sell is lab-ready—offering the precision, performance, and durability your team can count on.
Whether you’re outfitting a new lab or expanding an existing operation, choose American Instrument Exchange for tested, warrantied, and cost-effective laboratory equipment.
Warranty Information
All used equipment sold by American Instrument Exchange is refurbished/reconditioned, tested to meet specifications, cleaned, and comes with a 90-day warranty from the date of shipment unless otherwise specified. New products include a warranty from the manufacturer. Your warranty is only valid if you have paid your invoice. If your invoice is over 30 days old, warranty work will not be performed until your invoice is paid in full. American Instrument Exchange is not liable for any special or consequential damages that result from the use of, or the inability to use, the materials on this site or the performance of the products,
Exceptions include international sales and items that are agreed to be sold with a lesser warranty or items that are agreed to be sold “as is.”
Should there be visible shipping damage to packaging or concealed shipping damage to item(s) supplied, buyer must communicate such damage to the delivering entity or carrier upon receipt first and to American Instrument the same day item is accepted / signed for. Failure to do so voids warranty. Customer decision to involve / procure third party or OEM service other than American Instrument or AIE assigned vendors to resolve in-warranty instrument failure or defect without first placing a service call to American Instrument voids warranty.
Return & Cancellation Policy
American Instrument Exchange will authorize the return of and issue a full refund for any equipment that is not working as represented and could not be replaced or repaired to the customer’s satisfaction by AIE or a representative of AIE during the warranty period. Returns without prior authorization and an RMA number will not be accepted.
Customers are responsible for proper packaging of the equipment and all included accessories. American Instrument will pay for insurance and shipping costs. Non-inventory items bought specifically to fill customer orders may possibly be returned, but on a case by case basis.
Customers who cancel orders after refurbishing has begun or after delivery where there are no equipment performance issues may be subject to a Restocking/Cancellation Fee of 20% or more and responsible for shipping costs for both the delivery and return.
Ongoing and Extended Support Options
American Instrument Exchange is able to provide additional repair and support services outside the warranty terms for most products that sell.
For biosafety cabinets, clean benches, chemical fume hoods, and other clean air products our team at AIE Laboratory Services can provide certifications, repairs, decontaminations, and other services for customers throughout New England, and guidance and limited technical assistance for any customers in the US and Canada for new or refurbished biosafety cabinets purchased from American Instrument Exchange.
For all other products, the repair service team at American Instrument Exchange can provide both field and depot repair evaluations. We can easily schedule and coordinate the pick-up and transportation of your malfunctioning equipment. By offering hourly rates lower than most OEM service providers and eliminating travel time for technicians, we help reduce repair costs. Furthermore, our lab depot repair service minimizes or eliminates scheduling delays. Our experienced service technicians are qualified to restore your equipment to factory specifications.
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.
