The Thermo Scientific Haake AC150-A25 Arctic Refrigerated/Heated Bath Circulator combines precision heating, refrigeration, and fluid circulation in a versatile laboratory temperature-control system. With an operating range from -25°C to +150°C, a 7–12 L working bath volume, 500 W of cooling capacity, and circulation up to 20 L/min, the AC150-A25 is well suited for laboratories that require both below-ambient cooling and elevated-temperature heating from a single instrument.
Available used and refurbished from American Instrument Exchange, this Thermo Haake circulator combines the Arctic A25 refrigerated bath with the AC150 digital controller. The system can be used for direct temperature control of samples within the bath or to circulate temperature-controlled fluid through compatible external equipment. A 90-day warranty is included.
Key Features
-25°C to +150°C operating temperature range
7–12 L working bath volume
500 W cooling capacity
1200 W heater capacity
Temperature stability of approximately ±0.01°C
Maximum circulation flow up to 20 L/min
Digital AC150 controller
Five programmable temperature setpoints
Force/suction circulation pump
Digital display with easy-to-use controls
Acoustic and optical alarms
Adjustable high-temperature protection
Low-liquid-level protection
Suitable for internal bath and external circulation applications
Used, refurbished, and tested by American Instrument Exchange
90-day warranty included
Overview
The Thermo Scientific Haake AC150-A25 combines the larger Arctic A25 refrigerated bath with Thermo's AC150 temperature controller. Unlike a cooling-only recirculating chiller or conventional heated water bath, this system provides both active refrigeration and heating across a broad -25°C to +150°C operating range.
The A25 bath provides a working fluid volume of approximately 7–12 L, giving users more working space than compact refrigerated circulators such as the Arctic A10. Samples, vessels, and other compatible materials can be placed directly within the bath for temperature conditioning.
The integrated circulation pump can also supply conditioned heat-transfer fluid to compatible external equipment, allowing the AC150-A25 to function as an external temperature-control system for jacketed vessels, analytical instruments, condensers, and other laboratory apparatus.
The AC150 controller provides straightforward digital operation with five programmable setpoints, allowing frequently used temperatures to be stored and recalled without repeatedly entering new setpoints.
Key Specifications
Specification
Details
Manufacturer
Thermo Scientific / Haake
Model
AC150-A25
Series
Arctic
Equipment Type
Refrigerated/heated bath circulator
Temperature Range
-25°C to +150°C
Working Bath Volume
7–12 L
Maximum Bath Volume
12 L / 3.2 gal
Temperature Stability
Approx. ±0.01°C
Cooling Capacity
500 W
Heater Capacity
1200 W
Maximum Flow Rate
Up to 20 L/min
Pump Type
Force/suction circulation pump
Controller
AC150
Programmable Setpoints
5
Display
Digital
Work Area
Approx. 8.0 in. D × 6.8 in. W × 7.2 in. L
Exterior Dimensions
Approx. 10.7 in. W × 19.0 in. D × 29.5 in. H
Refrigerant
R134a
Electrical Requirements
115 V, 60 Hz
Weight
Approx. 79.5 lb
Warranty
90 days
Common Applications
The Thermo Haake AC150-A25 is suitable for laboratory procedures requiring precise heating, refrigeration, or temperature-controlled circulation. Typical applications include sample conditioning, reaction temperature control, analytical instrument cooling, materials testing, viscosity studies, calibration procedures, chemical synthesis, reagent conditioning, and general research applications.
Its integrated bath allows samples and vessels to be immersed directly in the temperature-controlled fluid. The larger A25 reservoir provides useful working space for applications that require more capacity than compact refrigerated baths.
The circulation system also allows the AC150-A25 to supply temperature-controlled fluid to compatible external equipment, including jacketed reaction vessels, analytical instruments, condensers, heat exchangers, and other temperature-sensitive laboratory apparatus.
Ideal Laboratory Types
The Thermo Scientific AC150-A25 is well suited for pharmaceutical and biotechnology laboratories, chemistry facilities, analytical laboratories, materials-science groups, quality-control departments, industrial R&D facilities, academic research laboratories, and other environments requiring precise temperature control.
Its combination of a relatively broad temperature range and moderate bath capacity makes it especially useful for laboratories that perform a variety of temperature-dependent procedures rather than operating continuously at a single setpoint.
The AC150-A25 can also be a practical dedicated temperature-control system for individual analytical instruments or experimental setups requiring external fluid circulation.
Temperature Control & Stability
The Thermo Haake AC150-A25 operates across a broad -25°C to +150°C temperature range with temperature stability of approximately ±0.01°C under appropriate operating conditions.
This wide range is one of the principal advantages of the A25 platform. Active refrigeration allows operation well below normal laboratory ambient temperatures, while the integrated heater extends operation to substantially elevated temperatures.
The refrigeration system provides approximately 500 W of cooling capacity. Actual available cooling capacity varies with operating temperature and environmental conditions, so applications with significant heat loads should be evaluated at their intended coolant temperature.
The 1200 W heater provides rapid heat input for elevated-temperature applications and helps the bath recover after cooler samples or external loads are introduced.
Heat-transfer fluid selection is particularly important with a system capable of operating from -25°C to +150°C. No single assumption about ordinary water should be applied across the entire operating range. Laboratories should select a compatible fluid appropriate for the intended setpoint and application.
Circulation & Pump Performance
The AC150-A25 uses active fluid circulation to maintain temperature uniformity within the bath and to transfer heating or cooling energy efficiently to immersed samples.
The circulation system can provide flow up to approximately 20 L/min. In internal-bath applications, continuous fluid movement helps minimize temperature gradients throughout the working area.
The system can also circulate fluid through compatible external equipment. This allows the AC150-A25 to provide temperature control for jacketed vessels, instruments, condensers, and other external loads rather than functioning solely as an immersion bath.
Actual external circulation performance depends on tubing diameter and length, fittings, fluid viscosity, operating temperature, elevation, and hydraulic resistance within the connected equipment.
Refurbishment & Testing
This used Thermo Scientific Haake AC150-A25 Refrigerated/Heated Bath Circulator is refurbished and tested by American Instrument Exchange before shipment. Our technicians inspect the refrigeration system, heater, circulation pump, AC150 controller, display, reservoir, electrical components, safety systems, and fluid connections.
Temperature-controlled equipment is tested using NIST-traceable probes and data loggers. Because the AC150-A25 provides both refrigeration and heating, the system is operated for extended periods at lower and higher temperatures to evaluate cooling, heating, circulation, temperature regulation, and controller operation.
The bath, reservoir, and accessible fluid-contact components are also cleaned and inspected prior to shipment.
If your application requires operation at a specific temperature or has particular testing requirements, contact American Instrument Exchange before shipment. When practical, our technicians can incorporate customer-requested operating conditions into final testing.
A 90-day warranty is included with this refurbished Thermo Scientific circulator.
Choosing the Right Refrigerated/Heated Circulator
The Thermo AC150-A25 is particularly useful for laboratories that need a combination of broad temperature capability, moderate bath capacity, and external circulation.
Compared with the smaller Arctic A10 platform, the A25 provides a larger 7–12 L working volume, greater refrigeration capacity, and a substantially lower minimum operating temperature. This makes it better suited for larger samples, greater thermal loads, and applications requiring temperatures well below ambient.
The -25°C to +150°C range also allows one circulator to support both subzero cooling and elevated-temperature heating applications. Laboratories should nevertheless consider the actual heat load, bath volume, external-loop resistance, and required working area when choosing a circulator.
Applications requiring temperatures above 150°C may benefit from an A25 equipped with a higher-range controller such as the AC200, while applications involving only modest cooling loads and smaller samples may be adequately served by a more compact refrigerated bath.
American Instrument Exchange can help compare available used and refurbished laboratory circulators based on temperature range, bath capacity, cooling capacity, pump requirements, and intended application.
Related Equipment
American Instrument Exchange stocks a range of laboratory circulators, including refrigerated/heated bath circulators, recirculating chillers, immersion circulators, and process temperature-control systems. Laboratories considering the Thermo AC150-A25 may also want to compare available laboratory water baths, reactors and fermenters, evaporators and extractors, and other refurbished laboratory equipment.
What is the temperature range of the Thermo AC150-A25?
The Thermo Scientific Haake AC150-A25 operates from approximately -25°C to +150°C, allowing both subzero refrigeration and elevated-temperature heating applications.
What is the bath capacity of the Thermo A25?
Thermo specifies a working bath volume of approximately 7–12 L, with a maximum bath volume of approximately 12 L or 3.2 gallons.
How much cooling capacity does the A25 provide?
The Arctic A25 refrigeration system provides approximately 500 W of cooling capacity. Available refrigeration capacity varies according to coolant temperature and operating conditions.
How stable is the temperature of the AC150-A25?
The AC150-A25 provides temperature stability of approximately ±0.01°C under appropriate operating conditions.
Can the AC150-A25 circulate fluid through external equipment?
Yes. The circulation system can supply temperature-controlled fluid to compatible external equipment as well as circulate fluid throughout its own bath.
What is the maximum circulation flow rate?
The AC150-A25 can provide circulation flow up to approximately 20 L/min. Actual flow through external equipment depends on the resistance of the circulation loop and other operating conditions.
What is the difference between the Thermo A10 and A25 refrigerated circulators?
The A25 provides a larger bath, greater refrigeration capacity, and a lower minimum operating temperature. The AC150-A25 operates from -25°C to +150°C with a 7–12 L working volume and 500 W of cooling capacity, making it better suited for larger or more demanding temperature-control applications.
What is the difference between an AC150-A25 and AC200-A25?
Both use the Arctic A25 refrigerated bath, but the controller determines some of the system's temperature and programming capabilities. Thermo specifies the AC150-A25 for operation up to 150°C, while an A25 equipped with an AC200 controller can operate at temperatures up to 200°C.
Does this refurbished Thermo AC150-A25 include a warranty?
Yes. This used Thermo Scientific Haake AC150-A25 is refurbished and tested by American Instrument Exchange and includes a 90-day warranty.
CLICK HEREto see the Thermo Haake AC150-A25 heating and cooling circulator 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.
