Thermo Scientific Haake SC150-A28 Circulator

Thermo Scientific Haake SC150-A28 Refrigerated/Heated Circulator

The Thermo Scientific Haake SC150-A28 Refrigerated/Heated Circulator is a precision laboratory temperature-control system designed for applications requiring both subzero cooling and elevated-temperature operation. Combining the Thermo Scientific ARCTIC A28 refrigerated bath with the SC150 digital controller, this system provides a broad -28°C to +150°C operating range, approximately ±0.02°C temperature stability, a 6–10 L working volume, and active fluid circulation up to approximately 17 L/min.

The SC150-A28 can be used as a direct-access refrigerated/heated bath for temperature conditioning of samples, laboratory vessels, probes, and test components. External circulation capability also allows temperature-controlled fluid to be supplied to compatible jacketed reactors, condensers, rotary evaporators, heat exchangers, analytical instruments, and other laboratory equipment.

Available used and refurbished from American Instrument Exchange, this Thermo Scientific Haake SC150-A28 is inspected and tested for refrigeration, heating, circulation, temperature regulation, and overall operating performance. A 90-day warranty is included.

Key Features

• -28°C to +150°C operating temperature range

• SC150 digital temperature controller

• Approximately ±0.02°C temperature stability

• 6–10 L working bath volume

• 320 W cooling capacity

• Maximum circulation flow approximately 17 L/min

• Maximum pump pressure approximately 300 mbar / 4.35 psi

• Approximately 1,200 W heating capacity in 115 V configuration

• Integrated mechanical refrigeration and heating

• Stainless-steel refrigerated bath

• Internal and external fluid circulation

• Compact 10.7"W × 19"D footprint

• Digital temperature display and control

• Adjustable controller position for easier viewing

• Low-liquid and over-temperature protection

• Suitable for direct bath and external circulation applications

• Refurbished and tested by American Instrument Exchange

• 90-day warranty included

Overview

The Thermo Scientific Haake SC150-A28 combines a precision digital circulator with a compact refrigerated stainless-steel bath capable of operation substantially below ambient temperature.

The A28 refrigeration system extends the lower operating limit to approximately -28°C, while the SC150 controller and integrated heater extend the upper range to approximately +150°C. This broad operating window allows one circulator to perform applications that might otherwise require separate refrigerated and heated temperature-control systems.

The A28 provides approximately 6–10 L of working bath volume. Its open stainless-steel reservoir allows compatible samples, vessels, sensors, test components, and other materials to be immersed directly in temperature-controlled fluid.

The system also supports external circulation. Temperature-controlled fluid can be pumped from the A28 through compatible laboratory equipment and returned to the bath, allowing the SC150-A28 to function as an external temperature-control source.

This combination of direct bath access, refrigeration, heating, precise digital control, and external circulation makes the SC150-A28 a versatile choice for laboratory research and testing.

Key Specifications

Common Applications

The Thermo Scientific Haake SC150-A28 is suitable for laboratory procedures requiring accurate temperature control across both refrigerated and heated conditions. Common applications include sample conditioning, materials testing, chemical reaction control, calibration, viscosity studies, reagent preparation, condenser cooling, rotary evaporation, jacketed vessel temperature control, analytical instrument cooling, and general laboratory research.

The -28°C lower operating limit makes the A28 particularly useful for applications requiring temperatures below the capabilities of more conventional refrigerated baths limited to approximately -10°C or -20°C.

For direct-bath applications, samples and compatible laboratory vessels can be immersed within the stainless-steel reservoir. Continuous circulation helps maintain consistent temperature conditions around the contents of the bath.

For external applications, temperature-controlled fluid can be circulated through compatible laboratory equipment and returned to the A28.

Ideal Laboratory Types

The Thermo Scientific Haake SC150-A28 is well suited for pharmaceutical and biotechnology laboratories, chemistry laboratories, analytical laboratories, materials-science facilities, process-development groups, quality-control departments, calibration laboratories, industrial R&D facilities, and academic research environments.

Its broad -28°C to +150°C temperature range is particularly useful for laboratories performing multiple types of thermal testing or research.

The SC150-A28 can also be valuable for facilities using jacketed reactors, rotary evaporators, condensers, test cells, or other equipment requiring a temperature-controlled external fluid loop.

Performance & Temperature Stability

The Thermo Scientific Haake SC150-A28 provides controlled operation from approximately -28°C to +150°C with temperature stability of approximately ±0.02°C under appropriate operating conditions.

The SC150 digital controller continuously monitors bath temperature and regulates the heating and cooling systems to maintain the selected setpoint. Active fluid circulation distributes conditioned fluid throughout the reservoir, improving thermal transfer and helping reduce temperature gradients within the bath.

The A28 refrigeration system provides approximately 320 W of cooling capacity. Available cooling performance varies with operating temperature, ambient conditions, bath loading, external heat load, and fluid selection.

At elevated temperatures, the integrated heater allows the system to operate as high as approximately +150°C when used with an appropriate heat-transfer fluid and suitable accessories.

Fluid selection is therefore particularly important with the SC150-A28. Water can be appropriate for many moderate-temperature applications but cannot cover the entire -28°C to +150°C operating range. Subzero and high-temperature applications require an appropriate compatible heat-transfer fluid.

The circulation system provides maximum flow of approximately 17 L/min with maximum pump pressure of approximately 300 mbar. Actual external flow will depend on tubing diameter and length, fittings, fluid viscosity, elevation, and resistance within the connected equipment.

Refurbishment & Testing

This used Thermo Scientific Haake SC150-A28 Refrigerated/Heated Circulator is refurbished and tested by American Instrument Exchange before shipment. Our technicians inspect the compressor, condenser, refrigeration circuit, heater, circulation pump, SC150 controller, temperature sensor, display, stainless-steel reservoir, external circulation connections, electrical components, housing, and applicable safety systems.

Temperature-controlled equipment is tested using NIST-traceable probes and data loggers. Because the SC150-A28 provides both heating and refrigeration, the unit can be operated at multiple temperatures to evaluate pull-down performance, heating, circulation, controller response, temperature regulation, and overall system stability.

The stainless-steel bath and accessible fluid-contact components are cleaned and inspected before shipment.

Customers requiring the SC150-A28 for a specific operating temperature, sample-conditioning procedure, or external circulation application are encouraged to provide their 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 Thermo Scientific Haake circulator.

Shipping & Installation

The Thermo Scientific Haake SC150-A28 weighs approximately 79 lb and should be transported with the bath drained and the refrigeration system properly protected. American Instrument Exchange prepares the unit for shipment with appropriate protection for the SC150 controller, refrigeration system, stainless-steel bath, housing, and fluid connections.

After installation, the A28 should be filled with a heat-transfer fluid appropriate for the intended operating temperature. Particular attention should be paid to fluid compatibility when operating below 0°C or at elevated temperatures approaching the upper end of the system's range.

Adequate ventilation should be maintained around the refrigeration system so that heat removed from the bath or connected equipment can be effectively rejected into the surrounding laboratory.

When using external circulation, supply and return tubing should be compatible with the operating temperature and securely connected before use. Tubing should be inspected for leaks before the system is operated at elevated temperature or with an external process.

Related Equipment

American Instrument Exchange stocks a range of laboratory circulators, including Thermo Scientific Haake refrigerated/heated circulators, circulating water baths, recirculating chillers, and immersion circulators. Laboratories considering the SC150-A28 may also want to compare available laboratory water baths, reactors and fermenters, evaporators and extractors, and other refurbished laboratory equipment.

Thermo Scientific Haake SC150-A28 Frequently Asked Questions

What is the temperature range of the Thermo Haake SC150-A28?

The SC150 controller paired with the A28 refrigerated bath provides an operating temperature range of approximately -28°C to +150°C.

What is the capacity of the A28 bath?

The A28 provides approximately 6–10 L, or 1.6–2.6 gallons, of working bath volume.

How much cooling capacity does the A28 provide?

Thermo Scientific specifies approximately 320 W of cooling capacity for the A28 refrigerated bath.

How stable is the SC150-A28?

The SC150 provides temperature stability of approximately ±0.02°C under appropriate operating conditions.

What is the pump flow rate?

The SC150 configuration provides maximum circulation flow of approximately 17 L/min.

What is the maximum pump pressure?

Maximum pump pressure is approximately 300 mbar, equivalent to approximately 4.35 psi.

Can samples be placed directly into the A28 bath?

Yes. The A28 has an open stainless-steel working reservoir measuring approximately 8 inches deep × 6.8 inches wide × 5 inches long for compatible direct-immersion applications.

Can the SC150-A28 circulate fluid through external equipment?

Yes. The circulator can supply temperature-controlled fluid to compatible jacketed reactors, condensers, heat exchangers, analytical instruments, test cells, and other closed-loop equipment.

Can the SC150-A28 be used with a rotary evaporator?

Yes. The A28 can provide refrigerated circulation to a compatible rotary evaporator condenser, provided its cooling capacity, temperature range, flow, and pressure meet the requirements of the evaporation process.

What is the difference between the Thermo Haake A25 and A28?

The A25 provides a -25°C lower temperature limit, approximately 7–12 L bath volume, and 500 W cooling capacity. The A28 reaches approximately -28°C but uses a somewhat smaller 6–10 L bath and provides approximately 320 W cooling capacity.

What is the difference between the A28 and A28F?

Both provide approximately 320 W cooling capacity, a 6–10 L working volume, and a -28°C lower temperature capability. The principal difference is physical configuration: the standard A28 has a narrow upright footprint, while the A28F uses a lower, wider configuration.

Can the SC150-A28 heat as well as cool?

Yes. The combination includes both mechanical refrigeration and an integrated heater, allowing operation from subzero temperatures to approximately +150°C.

Can I use water across the entire temperature range?

No. Water is useful for many moderate-temperature applications but cannot safely cover the complete -28°C to +150°C range. An appropriate compatible heat-transfer fluid should be selected for subzero or high-temperature operation.

What are the dimensions of the SC150-A28?

The complete system measures approximately 28 inches high × 10.7 inches wide × 19 inches deep and weighs approximately 79 lb.

Does this refurbished Thermo Scientific Haake SC150-A28 include a warranty?

Yes. This used Thermo Scientific Haake SC150-A28 is refurbished and tested by American Instrument Exchange and includes a 90-day warranty.