Used PolyScience 7-Liter Refrigerated Circulating Bath

Advanced Digital Controller | +/- 0.01°C Precision | -20°C to 200°C Thermal Range

The PolyScience 7 Liter -20°C Refrigerated Circulator with Digital Controller is a used laboratory temperature-control system designed for precise heating, cooling, recirculation, and thermal regulation in research, analytical, quality control, and process-development environments. Also described as a PolyScience recirculating chiller and 7L heating bath, this unit provides a wide working temperature range of -20°C to 200°C, making it a versatile option for laboratories that need both refrigerated cooling and heated bath capability in one compact system.

This PolyScience AD07R-20-A118 features a 7 liter / 1.85 gallon bath capacity, ±0.01°C temperature stability, and a 4.3-inch SmartTouch touchscreen display for digital control and monitoring. It is designed for applications where accurate and repeatable temperature control is critical, including sample preparation, analytical instrumentation support, viscosity testing, reactor temperature control, calibration workflows, and general laboratory heating and cooling.

This unit stands out because it combines refrigerated cooling, heating bath capability, digital touchscreen control, and high temperature stability in a single used laboratory circulator. For labs looking to control equipment temperatures without paying full new equipment pricing, this PolyScience refrigerated circulator offers strong value.

For related equipment, browse HiTechTrader’s used laboratory equipment, laboratory reactors, analytical instruments, and laboratory pumps.

Precise Temperature Control from -20°C to 200°C

The main advantage of the PolyScience 7 Liter Refrigerated Circulator is its wide working temperature range. With the ability to operate from -20°C to 200°C, this system can support both low-temperature cooling and elevated-temperature heating workflows.

This makes it useful for laboratories that need:

• chilled fluid circulation
• heated bath temperature control
• sample temperature stabilization
• reaction temperature support
• instrument cooling
• viscosity testing support
• calibration bath workflows
• controlled thermal testing
• process development
• QA/QC temperature regulation

Instead of requiring separate equipment for heating and cooling, this PolyScience unit gives labs one flexible temperature control platform for a wide range of applications.

What Makes This PolyScience Circulator Stand Out

This product should be positioned as a used precision refrigerated/heated circulating bath, not just a basic lab water bath or small chiller. Its value comes from the combination of wide temperature range, touchscreen control, and very tight temperature stability.

Key standout features include:

• -20°C to 200°C working temperature range for heating and cooling workflows
• 7 liter / 1.85 gallon bath capacity for practical laboratory use
• ±0.01°C temperature stability for precision temperature control
• 4.3-inch SmartTouch touchscreen display for modern digital operation
• Model AD07R-20-A118 for clear product identification
• Used equipment value compared with buying new temperature-control equipment
• Strong fit for reactors, analytical instruments, calibration, and sample prep workflows

For laboratories comparing temperature control equipment, this unit is best positioned for precision thermal regulation, not simple heating or basic chilling.

Refrigerated Circulator and Heating Bath in One System

This PolyScience system can function as both a recirculating chiller and a heating bath, giving laboratories flexibility across different temperature-control workflows. The refrigerated capability supports sub-ambient cooling down to -20°C, while the heating capability supports elevated temperatures up to 200°C.

This dual function design may reduce the need for separate chillers, baths, and heating systems in some lab setups.

Common uses include:

• cooling analytical instruments
• maintaining reactor jacket temperatures
• heating or cooling samples
• supporting external temperature controlled loops
• controlling condenser or process temperatures
• stabilizing lab test conditions
• running temperature sensitive experiments

For labs working with multiple processes, a refrigerated/heated circulator can be a practical way to improve workflow flexibility.

±0.01°C Temperature Stability for Sensitive Workflows

The supplied specification lists temperature stability of ±0.01°C, making this unit suitable for workflows where tight temperature control matters. Consistent temperature performance is important because even small changes can affect test results, reaction behavior, viscosity readings, calibration accuracy, or analytical repeatability.

This high stability helps support:

• repeatable experimental conditions
• consistent sample temperatures
• improved analytical method reliability
• controlled reaction environments
• better calibration support
• reduced temperature drift during testing

For laboratories that need precise thermal control, the PolyScience AD07R-20-A118 refrigerated circulator is a strong option.

4.3-Inch SmartTouch Digital Controller

This PolyScience refrigerated circulator includes a 4.3-inch SmartTouch touchscreen display. A digital touchscreen controller makes it easier for users to set, monitor, and adjust temperature parameters compared with older analog bath controllers.

The SmartTouch interface supports:

• clear temperature visibility
• easier setpoint control
• simplified operation
• modern digital workflow management
• improved usability for lab staff
• more efficient temperature monitoring

For laboratories upgrading older temperature-control equipment, the touchscreen interface helps make this unit more user friendly and easier to integrate into daily workflows.

7 Liter Bath Capacity for Practical Lab Use

With a 7 liter / 1.85 gallon capacity, this PolyScience unit offers a useful bath size for many research, QC, and process-support workflows. The capacity is large enough for common laboratory temperature-control tasks while remaining compact enough for benchtop or equipment-adjacent use.

The 7L bath capacity may be useful for:

• sample containers
• calibration items
• immersion workflows
• external circulation loops
• reactor support
• small instrument cooling
• temperature controlled fluid baths

This size makes the system versatile for both direct bath use and external circulating applications.

Technical Specifications

Typical Applications

The PolyScience 7 Liter -20°C Refrigerated Circulator is suitable for laboratories that need accurate heating, cooling, and fluid circulation.

Common applications include:

• reactor temperature control
• analytical instrument cooling
• sample preparation
• viscosity testing
• calibration workflows
• condenser temperature support
• process development
• chemical research
• pharmaceutical research
• materials testing
• QA/QC laboratory testing
• temperature sensitive experiments
• general lab heating and cooling
• external circulation loops

This circulator is especially useful when the workflow requires both cooling below room temperature and heating above ambient temperature.

Key Benefits

Wide -20°C to 200°C Temperature Range

Supports both refrigerated cooling and heated bath workflows in one system.

7 Liter Bath Capacity

Provides practical capacity for laboratory samples, fluid circulation, and temperature-control applications.

±0.01°C Temperature Stability

Helps maintain precise, repeatable temperature conditions for sensitive workflows.

SmartTouch Digital Controller

The 4.3-inch touchscreen display supports easy temperature control and monitoring.

Refrigerated Circulator Functionality

Useful for external temperature control loops, instrument cooling, and process support.

Heating Bath Capability

Supports elevated temperature sample conditioning, testing, and thermal regulation.

Used Equipment Value

Gives laboratories access to PolyScience temperature control equipment at a lower cost than many new systems.

Why Buy This PolyScience Refrigerated Circulator from HiTechTrader?

HiTechTrader helps laboratories source scientific, analytical, chemical processing, and laboratory equipment for research, testing, purification, process development, and production support. This used PolyScience 7 Liter -20°C Refrigerated Circulator with Digital Controller is a strong option for buyers who need accurate heating, cooling, and fluid circulation capability.

This circulator can support or pair with compatible lab systems and equipment, including:

• laboratory reactors
• Parr reactors
• analytical instruments
• laboratory pumps
• used laboratory equipment
• containment and safety equipment

For laboratories building a complete temperature controlled workflow, this PolyScience refrigerated circulator may be used alongside reactors, condensers, jacketed vessels, analytical instruments, circulating loops, pumps, and process development equipment.

Used PolyScience 7 Liter Refrigerated Circulator for Sale

HiTechTrader offers this used PolyScience AD07R-20-A118 7 Liter -20°C Refrigerated Circulator with Digital Controller for laboratories needing precise heating, cooling, and recirculation capability.

This unit is a strong fit for research labs, pharmaceutical labs, chemical processing labs, analytical testing facilities, university laboratories, QA/QC departments, materials research groups, and process development teams.

Contact HiTechTrader to request pricing, verify included accessories, or source additional laboratory temperature control equipment for your setup.

FAQ Section

What is the PolyScience AD07R-20-A118 used for?

The PolyScience AD07R-20-A118 is used for laboratory heating, cooling, recirculation, reactor temperature control, analytical instrument cooling, sample preparation, calibration, and process development workflows.

What is the bath capacity?

This PolyScience refrigerated circulator has a 7 liter / 1.85 gallon capacity.

What is the working temperature range?

The working temperature range is -20°C to 200°C.

How stable is the temperature control?

The supplied specification lists ±0.01°C temperature stability, making it suitable for sensitive temperature-control applications.

What type of display does it have?

This unit includes a 4.3-inch SmartTouch touchscreen display for digital temperature control and monitoring.

Is this a chiller or a heating bath?

This unit can be described as both a recirculating chiller and a heating bath, because it supports cooling down to -20°C and heating up to 200°C.

What model is this unit?

The model number is AD07R-20-A118.

Is this PolyScience circulator new or used?

This PolyScience 7 Liter Refrigerated Circulator is listed in used condition.

Why buy a used PolyScience refrigerated circulator from HiTechTrader?

Buying used temperature control equipment from HiTechTrader can help laboratories source reliable lab circulators at a lower cost than many new systems. HiTechTrader can help confirm availability, included accessories, specifications, and related lab equipment options.