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LAUDA PRO RP 245 E Cooling Circulation Thermostat
The LAUDA PRO RP 245 E is a high-performance cooling and heating circulation thermostat designed for precise temperature control across an exceptionally broad operating range. With temperatures from -45°C to +200°C, temperature stability of ±0.05 K, and a powerful pressure-suction pump, the PRO RP 245 E is well suited for demanding laboratory, research, process-development, and production applications requiring controlled fluid circulation.
Available used and refurbished from American Instrument Exchange, this LAUDA refrigerated circulator combines heating, refrigeration, pumping, and programmable temperature control in a compact floor-standing system. Its low 2.4–4.4 L filling volume supports rapid temperature changes, while external circulation capability allows the unit to control compatible reactors, jacketed vessels, analytical instruments, and other laboratory equipment. A 90-day warranty is included.
Key Features
Wide -45°C to +200°C operating temperature range
Temperature stability of ±0.05 K
Maximum pressure-side pump flow of 22 L/min
Eight selectable pump levels
Pressure-suction pump for demanding external circulation applications
Compact 2.4–4.4 L filling volume for responsive temperature changes
Integrated programmer with one program and up to 20 segments
High-contrast graphic OLED display
USB and Ethernet interfaces
Used, refurbished, and tested by American Instrument Exchange
90-day warranty included
Overview
The LAUDA PRO RP 245 E is a refrigerated heating and cooling circulator developed primarily for external temperature-control applications. Its combination of active refrigeration, electric heating, precise electronic control, and pressure-suction circulation allows one system to handle processes ranging from deep sub-ambient cooling to temperatures as high as +200°C.
Unlike a conventional laboratory water bath intended primarily for samples placed inside an open reservoir, the PRO RP 245 E is designed to circulate temperature-controlled fluid through external equipment. Its relatively small internal fluid volume helps the system respond rapidly when changing temperatures, making it particularly useful for applications involving temperature ramps, cycling, or frequently changing setpoints.
The integrated controller includes an OLED display and programmable operation, while USB and Ethernet connectivity provide additional options for laboratory integration, monitoring, and data management.
Key Specifications
Specification
Details
Manufacturer
LAUDA
Model
PRO RP 245 E
Equipment Type
Cooling/heating circulation thermostat
Temperature Range
-45°C to +200°C
Temperature Stability
±0.05 K
Filling Volume
2.4–4.4 L
Maximum Pump Flow, Pressure Side
22 L/min
Maximum Pump Flow, Suction Side
20 L/min
Maximum Pump Pressure
0.7 bar
Maximum Pump Suction
0.4 bar
Pump
Pressure-suction pump; 8 selectable levels
Inlet/Outlet Connection
M16 × 1
Hose Olive Diameter
13 mm
Display
Graphic OLED
Programmer
1 program, up to 20 segments
Interfaces
USB and Ethernet
Dimensions
11.8 in. W × 16.9 in. D × 26.6 in. H
Electrical Requirements
115 V, 60 Hz
Weight
Approximately 88 lb
Common Applications
The LAUDA PRO RP 245 E is designed for applications requiring precise external temperature control over a much wider range than a conventional circulating water bath. Typical uses include temperature control of jacketed reaction vessels, chemical reactors, condensers, analytical instruments, material-testing systems, process equipment, and other externally connected laboratory apparatus.
Its ability to both refrigerate and heat makes the RP 245 E particularly useful for research involving temperature ramps or cycling. Rather than using separate heating and cooling systems, laboratories can use a single circulator to move between low- and high-temperature conditions while maintaining controlled fluid circulation.
Ideal Laboratory Types
The PRO RP 245 E is well suited for pharmaceutical and biotechnology research, chemical laboratories, process-development groups, materials-science facilities, analytical laboratories, industrial R&D, quality-control environments, and academic research laboratories.
Its broad operating range and external circulation capabilities are particularly valuable for laboratories conducting experiments or processes in which temperature is a critical controlled variable rather than simply a means of maintaining samples near physiological or ambient conditions.
Temperature Control & Stability
The -45°C to +200°C working range is one of the most significant advantages of the LAUDA PRO RP 245 E. This broad range allows the circulator to support deep sub-ambient cooling, moderate-temperature work, and high-temperature applications using one temperature-control platform.
Temperature stability of ±0.05 K provides consistent fluid conditions for applications where temperature fluctuations could affect experimental results or process repeatability.
Cooling capacity varies according to operating temperature. The refrigeration system provides approximately 0.8 kW of cooling at temperatures from 0°C to +20°C, with available cooling capacity progressively decreasing at lower temperatures. Laboratories should therefore evaluate the actual thermal load at their intended setpoint rather than selecting a circulator based solely on its minimum operating temperature.
Circulation & Pump Performance
The PRO RP 245 E uses a pressure-suction pump with eight selectable operating levels. Maximum pressure-side flow is approximately 22 L/min, while maximum suction-side flow is approximately 20 L/min. Maximum pump pressure is approximately 0.7 bar, with maximum suction of approximately 0.4 bar.
This pressure-suction design provides additional flexibility when circulating temperature-control fluid through external laboratory equipment. Pump output can be adjusted to suit the hydraulic requirements of the connected system rather than operating continuously at maximum output.
Actual circulation rates depend on the complete installation, including hose diameter and length, fluid viscosity, fittings, elevation differences, temperature, and resistance within the connected equipment. Laboratories should verify both the flow and pressure limitations of their application before operation.
Refurbishment & Testing
This used LAUDA PRO RP 245 E is refurbished and tested by American Instrument Exchange before shipment. Our technicians inspect the refrigeration, heating, circulation, temperature-control, electrical, and user-interface systems and operate the unit to confirm proper functionality.
The pump and circulation system are checked for proper operation, while temperature performance is evaluated using appropriate temperature-measurement equipment. Fluid-contact areas are cleaned and the system is prepared for shipment after testing.
If your application requires operation at a particular temperature or under specific conditions, contact American Instrument Exchange before shipment. When practical, our technicians can incorporate customer-requested conditions into the final testing process.
A 90-day warranty is included with this refurbished LAUDA circulator.
Choosing the Right Cooling and Heating Circulator
Selecting a laboratory circulator requires more than comparing minimum and maximum temperatures. Buyers should consider cooling capacity at the required setpoint, heater performance, pump flow and pressure, temperature stability, fluid compatibility, external equipment requirements, and available electrical service.
The PRO RP 245 E is particularly attractive for applications requiring both low-temperature refrigeration and high-temperature heating from a single circulator. Its -45°C to +200°C range provides substantially greater versatility than a conventional refrigerated water bath or cooling-only recirculating chiller.
Applications involving large thermal loads should also consider available cooling capacity at their actual target temperature. The fact that a circulator can reach a specified minimum temperature does not necessarily mean it can maintain that temperature while removing a large external heat load.
American Instrument Exchange can help compare available used and refurbished laboratory circulators based on your required temperature range, cooling load, pump requirements, and application.
Related Equipment
American Instrument Exchange stocks a variety of laboratory circulators for heating, cooling, and external temperature-control applications. Laboratories using the LAUDA PRO RP 245 E may also require laboratory water baths, reactors and fermenters, evaporators and extractors, or other refurbished laboratory equipment for temperature-sensitive research and process applications.
LAUDA PRO RP 245 E Frequently Asked Questions
What is the temperature range of the LAUDA PRO RP 245 E?
The PRO RP 245 E provides a working temperature range of -45°C to +200°C, allowing one circulator to support both sub-ambient cooling and high-temperature applications.
How stable is the temperature in the LAUDA RP 245 E?
The RP 245 E has a specified temperature stability of ±0.05 K, making it suitable for applications requiring consistent and repeatable temperature control.
Can the LAUDA PRO RP 245 E control external laboratory equipment?
Yes. The PRO RP 245 E is designed primarily for external temperature-control applications. It can circulate conditioned fluid through compatible jacketed vessels, reactors, analytical instruments, condensers, and other laboratory or process equipment.
What is the maximum pump flow rate of the RP 245 E?
Maximum pressure-side pump flow is approximately 22 L/min, while maximum suction-side flow is approximately 20 L/min. Actual flow depends on tubing, fittings, fluid properties, temperature, and the resistance of the connected system.
How much cooling capacity does the LAUDA RP 245 E provide?
The refrigeration system provides approximately 0.8 kW of cooling capacity from 0°C through +20°C. Cooling capacity decreases at lower operating temperatures, so the application's thermal load should be considered when selecting a circulator.
Is the LAUDA PRO RP 245 E programmable?
Yes. The controller includes an integrated programmer supporting one program with up to 20 segments, making it possible to create controlled temperature sequences rather than operating only at a fixed setpoint.
Does this refurbished LAUDA circulator include a warranty?
Yes. This used LAUDA PRO RP 245 E is refurbished and tested by American Instrument Exchange and includes a 90-day warranty.
CLICK HEREto see the LAUDA PRO RP254 E cooling circulation thermostat 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.
