Haake C20 Refrigerated Circulator
The Haake C20 Refrigerated Circulator is a laboratory temperature-control system designed to provide both subambient cooling and controlled heating for research, analytical, and process applications. With an operating temperature range of approximately -20°C to +100°C, digital temperature control, active fluid circulation, and an integrated refrigerated bath, the C20 provides a versatile solution for laboratories that require temperature control both below and above ambient conditions.
Available used and refurbished from American Instrument Exchange, the Haake C20 can be used for direct bath applications as well as compatible external circulation applications. Typical uses include sample conditioning, reaction temperature control, condenser cooling, viscosity studies, materials testing, and circulation through jacketed laboratory equipment. A 90-day warranty is included.
Key Features
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-20°C to +100°C operating temperature range
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Refrigerated and heated temperature control
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Digital temperature controller
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Active fluid circulation
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Integrated refrigerated bath
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Suitable for subambient laboratory applications
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Direct bath temperature control
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External circulation capability for compatible equipment
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Designed for continuous laboratory temperature control
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Useful for reaction and process temperature control
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Compact laboratory configuration
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Used, refurbished, and tested by American Instrument Exchange
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90-day warranty included
Overview
The Haake C20 combines refrigeration, heating, temperature regulation, and fluid circulation in a single laboratory system.
Unlike a conventional heated water bath, the C20 incorporates mechanical refrigeration that allows operation below normal laboratory ambient temperature. At the same time, its heating system extends operation to approximately +100°C, allowing one circulator to support a broad range of laboratory procedures.
Active circulation continuously moves heat-transfer fluid through the bath, improving heat transfer and helping maintain consistent temperature conditions. The circulation system can also supply temperature-controlled fluid to compatible external equipment.
This combination makes the Haake C20 useful for laboratories that need greater flexibility than a simple water bath or cooling-only chiller can provide.
The digital controller allows operators to set and monitor operating temperature directly from the instrument, making the C20 suitable for routine laboratory workflows where repeatable temperature conditions are important.
Key Specifications
| Specification |
Details |
| Manufacturer |
Haake / Thermo Haake |
| Model |
C20 |
| Equipment Type |
Refrigerated/heated circulator |
| Temperature Range |
-20°C to +100°C |
| Temperature Controller |
Digital |
| Refrigeration |
Integrated |
| Heating |
Integrated |
| Internal Circulation |
Yes |
| External Circulation |
Yes, for compatible equipment |
| Bath Configuration |
Refrigerated bath |
| Bath Capacity |
Verify individual unit configuration |
| Cooling Capacity |
Verify individual unit configuration |
| Pump Flow |
Verify individual unit configuration |
| Pump Pressure |
Verify individual unit configuration |
| Electrical Requirements |
Verify individual unit nameplate |
| Warranty |
90 days |
Common Applications
The Haake C20 can support a broad range of laboratory procedures requiring controlled heating or cooling. Typical applications include sample conditioning, chemical reaction control, viscosity measurements, materials testing, reagent temperature control, condenser cooling, jacketed vessel temperature control, analytical instrument temperature control, and general research applications.
Its subambient capability makes it particularly useful for procedures that cannot be performed with a conventional heated water bath.
For direct bath applications, samples, vessels, or compatible laboratory devices can be placed in the temperature-controlled reservoir. Active circulation helps maintain consistent fluid temperature throughout the working area.
For external applications, the C20 can circulate temperature-controlled fluid through compatible laboratory equipment such as jacketed reaction vessels, condensers, heat exchangers, and analytical systems.
Ideal Laboratory Types
The Haake C20 is well suited for chemistry laboratories, pharmaceutical and biotechnology facilities, analytical laboratories, materials-science groups, quality-control departments, process-development laboratories, industrial R&D facilities, and academic research environments.
Its -20°C to +100°C operating range covers many common laboratory temperature-control procedures without requiring separate heating and cooling equipment.
The C20 can also be useful for laboratories maintaining established methods or legacy experimental systems originally developed around Haake temperature-control equipment.
Temperature Control & Stability
The Haake C20 provides controlled operation across an approximately -20°C to +100°C temperature range.
Integrated refrigeration allows the system to remove heat and maintain temperatures below laboratory ambient conditions, while its heating system provides controlled operation at elevated temperatures.
Active circulation continuously moves fluid through the bath. This improves heat transfer between the temperature-control system and the bath fluid while helping reduce temperature gradients around immersed samples.
For external applications, temperature-controlled fluid can also be circulated through compatible equipment before returning to the bath.
Cooling performance will vary according to operating temperature and process heat load. As with other refrigerated circulators, the amount of heat the C20 can continuously remove generally decreases as operating temperature falls.
Customers using the C20 to control an external heat-generating instrument or process should therefore consider both the required temperature and the amount of heat that must be removed.
Circulation & Pump Performance
The Haake C20 uses active circulation for both internal bath mixing and compatible external temperature-control applications.
Within the bath, continuous fluid movement improves thermal transfer and helps maintain consistent conditions around samples and laboratory vessels.
External circulation expands the usefulness of the C20 by allowing temperature-controlled fluid to be supplied to compatible jacketed vessels, condensers, heat exchangers, and other laboratory equipment.
Actual external circulation performance depends on the installed pump as well as tubing diameter, tubing length, fittings, elevation, fluid viscosity, operating temperature, and hydraulic resistance within the connected equipment.
Because Haake produced multiple temperature-control systems and configurations using similar C-series designations, pump specifications should be verified from the individual unit rather than assumed from another C20 configuration.
Customers with specific minimum flow or pressure requirements are encouraged to contact American Instrument Exchange before purchase.
Refurbishment & Testing
This used Haake C20 Refrigerated Circulator is refurbished and tested by American Instrument Exchange before shipment. Our technicians inspect the refrigeration system, heater, circulation pump, temperature controller, digital display, bath, condenser, electrical components, safety controls, and external circulation connections.
Temperature-controlled equipment is tested using NIST-traceable probes and data loggers. The C20 is operated under simulated laboratory conditions to evaluate refrigeration, heating, circulation, temperature regulation, controller operation, and overall system stability.
Because this system provides both heating and cooling, extended testing can be performed at both ends of its operating range to verify temperature-control performance.
The bath and accessible fluid-contact components are also cleaned and inspected before shipment.
Customers requiring operation at a particular temperature or with specific external circulation requirements are encouraged to provide those conditions 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 Haake circulator.
Choosing the Right Circulator or Water Bath
The Haake C20 is a useful choice for laboratories that require both refrigerated and heated temperature control but do not necessarily need the extreme temperature capabilities of a larger process circulator.
Its approximately -20°C to +100°C operating range covers many common chemistry, analytical, research, and process-development applications.
Compared with a conventional heated water bath, the primary advantage is mechanical refrigeration. The C20 can actively maintain temperatures below ambient rather than relying on ice, cooling water, or another external cooling source.
Compared with a cooling-only recirculating chiller, the C20 offers the advantages of active heating and an accessible bath for direct immersion applications.
Buyers should consider the required temperature range, external process heat load, bath capacity, circulation requirements, electrical service, and heat-transfer fluid when selecting a refrigerated circulator.
American Instrument Exchange can help compare available used and refurbished Haake circulators based on these requirements.
Related Equipment
American Instrument Exchange stocks a range of laboratory circulators, including Haake refrigerated circulators, heated circulating baths, recirculating chillers, and immersion circulators. Laboratories considering the Haake C20 may also want to compare available laboratory water baths, reactors and fermenters, evaporators and extractors, and other refurbished laboratory equipment.
Haake C20 Frequently Asked Questions
What is the temperature range of the Haake C20?
This Haake C20 is rated for operation from approximately -20°C to +100°C, allowing both refrigerated and heated laboratory applications.
Is the Haake C20 refrigerated?
Yes. This C20 incorporates mechanical refrigeration for controlled operation below normal laboratory ambient temperature.
Does the Haake C20 also provide heating?
Yes. The system provides both refrigeration and heating, allowing temperature control across its -20°C to +100°C operating range.
Does the Haake C20 have digital temperature control?
Yes. This unit is equipped with a digital controller for setting and monitoring operating temperature.
Can samples be placed directly in the bath?
Yes. The refrigerated bath can be used for compatible direct-immersion applications.
Can the Haake C20 circulate fluid through external equipment?
Yes. The circulation system can supply temperature-controlled fluid to compatible external equipment such as jacketed vessels, condensers, and heat exchangers.
Is the Haake C20 a recirculating chiller?
It can perform external cooling functions, but it is more accurately described as a refrigerated/heated circulator because it provides both heating and cooling and includes an accessible temperature-controlled bath.
What should I know before connecting the C20 to external equipment?
Determine the required coolant temperature, process heat load, minimum flow, allowable pressure, tubing configuration, and appropriate heat-transfer fluid. Customers with specific requirements can contact American Instrument Exchange before shipment so the unit can be evaluated for the intended application.
Does this refurbished Haake C20 include a warranty?
Yes. This used Haake C20 is refurbished and tested by American Instrument Exchange and includes a 90-day warranty.
