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LAUDA WK1200 Recirculating Chiller
The LAUDA WK1200 Recirculating Chiller is a high-flow laboratory and process cooling system designed for reliable heat removal from analytical instruments, laboratory equipment, and technical processes. With a -10°C to +40°C working temperature range, approximately 1.2 kW of cooling capacity at 20°C, maximum circulation flow of 40 L/min, and maximum discharge pressure of 3.2 bar, the WK1200 provides considerably greater pump performance than many smaller laboratory recirculating chillers.
Available used and refurbished from American Instrument Exchange, the LAUDA WK1200 provides a dedicated closed-loop source of temperature-controlled coolant for demanding laboratory and process applications. Its combination of high circulation flow and substantial pump pressure makes it useful for cooling analytical instruments, rotary evaporators, electron microscopes, X-ray equipment, condensers, and other externally connected systems. A 90-day warranty is included.
Key Features
-10°C to +40°C working temperature range
Approximately ±0.5°C temperature stability
1.2 kW cooling capacity at 20°C
1.0 kW cooling capacity at 10°C
0.9 kW cooling capacity at 0°C
Maximum circulation flow of 40 L/min
Maximum discharge pressure of 3.2 bar
Adjustable bypass for pressure limitation
Air-cooled refrigeration system
Digital temperature setpoint adjustment
LED temperature display
Designed for external laboratory and process cooling
Closed-loop operation can reduce facility-water consumption
Used, refurbished, and tested by American Instrument Exchange
90-day warranty included
Overview
The LAUDA WK1200 is an air-cooled recirculating chiller designed for applications where operating heat must be removed continuously and reliably. The system refrigerates and recirculates heat-transfer fluid through externally connected equipment, providing a dedicated cooling loop independent of seasonal fluctuations in facility-water temperature and pressure.
One of the distinguishing characteristics of the WK1200 is its pump performance. With maximum flow of approximately 40 L/min and maximum discharge pressure of 3.2 bar, this model can support more demanding external circulation applications than many smaller benchtop laboratory chillers.
The refrigeration system provides approximately 1.2 kW of cooling capacity at a 20°C coolant temperature. This combination of refrigeration capacity, flow, and pressure makes the WK1200 useful for both individual instruments and larger laboratory cooling applications.
Straightforward digital setpoint adjustment and an LED display allow operators to set and monitor coolant temperature without an unnecessarily complicated interface.
Key Specifications
Specification
Details
Manufacturer
LAUDA
Model
WK1200
Equipment Type
Air-cooled recirculating chiller
Working Temperature Range
-10°C to +40°C
Ambient Temperature Range
5°C to 40°C
Temperature Stability / Accuracy
Approx. ±0.5°C
Setpoint Selection
Digital
Display
LED
Cooling Capacity at 20°C
1.2 kW
Cooling Capacity at 10°C
1.0 kW
Cooling Capacity at 0°C
0.9 kW
Cooling Capacity at -5°C
0.8 kW
Cooling Capacity at -10°C
Approx. 0.7 kW
Maximum Pump Flow
40 L/min
Maximum Discharge Pressure
3.2 bar
Pressure Control
Adjustable bypass for pressure limitation
Pump Connections
G 3/4 in.
Condenser Cooling
Air
Exterior Dimensions
Approx. 18 in. W × 22 in. D × 32 in. H
Electrical Requirements
115 V, 60 Hz
Warranty
90 days
Common Applications
The LAUDA WK1200 is suitable for applications requiring reliable removal of moderate to substantial heat loads from laboratory and technical equipment. Typical uses include rotary evaporators, analytical instruments, electron microscopes, X-ray systems, refractometers, distillation equipment, condensers, cold traps, and other temperature-sensitive laboratory systems.
Its relatively high circulation capacity can also make the WK1200 useful when supplying cooling fluid to larger equipment or compatible multi-component laboratory setups.
Another important application is replacement of once-through tap-water cooling. Instead of continuously drawing facility water and discharging it to drain, the WK1200 refrigerates and recirculates a controlled volume of heat-transfer fluid through a closed loop.
This can reduce water consumption while providing coolant at a more predictable temperature and pressure.
Ideal Laboratory Types
The LAUDA WK1200 is well suited for chemistry laboratories, pharmaceutical and biotechnology facilities, analytical laboratories, materials-science groups, microscopy facilities, industrial R&D laboratories, quality-control departments, academic research laboratories, and other environments operating heat-generating equipment.
Its combination of 40 L/min maximum flow and 3.2 bar maximum pressure makes it especially relevant for laboratories with more demanding circulation requirements than those served by smaller general-purpose chillers.
The WK1200 can also be a practical choice for facilities looking to replace continuous facility-water cooling with a dedicated closed-loop system.
Temperature Control & Stability
The LAUDA WK1200 provides a working temperature range from -10°C to +40°C with temperature stability of approximately ±0.5°C.
Available cooling capacity changes with coolant temperature. The WK1200 provides approximately 1.2 kW at 20°C, 1.0 kW at 10°C, 0.9 kW at 0°C, 0.8 kW at -5°C, and approximately 0.7 kW at -10°C.
This performance curve is important when determining whether the WK1200 is appropriate for a particular application. A process generating a 1 kW heat load may be within the chiller's capabilities around 10°C but could exceed its available refrigeration capacity at substantially lower coolant temperatures.
Buyers should therefore match the application's thermal load to the cooling capacity available at the actual intended operating temperature rather than relying solely on the chiller's -10°C minimum temperature specification.
Circulation & Pump Performance
Pump performance is one of the strongest features of the LAUDA WK1200. The circulation system provides a maximum flow rate of approximately 40 L/min and maximum discharge pressure of approximately 3.2 bar.
This combination gives the WK1200 both substantial fluid-moving capacity and enough pressure for applications that create greater hydraulic resistance than an unrestricted cooling loop.
An adjustable bypass provides pressure limitation, allowing the circulation system to be better matched to the requirements of connected equipment.
Actual flow through an installed cooling loop will depend on tubing diameter and length, fittings, heat-transfer-fluid viscosity, operating temperature, elevation changes, and hydraulic resistance within the connected equipment.
Before connecting sensitive analytical equipment, laboratories should verify the instrument's allowable coolant pressure and required flow.
Refurbishment & Testing
This used LAUDA WK1200 Recirculating Chiller is refurbished and tested by American Instrument Exchange before shipment. Our technicians inspect the refrigeration system, circulation pump, temperature controller, display, reservoir, electrical components, safety systems, and fluid connections.
Temperature-controlled equipment is tested using NIST-traceable probes and data loggers. The refrigeration system is operated to verify cooling and temperature regulation, while pump operation and fluid circulation are evaluated under simulated laboratory conditions.
The reservoir and accessible fluid-contact areas are cleaned and inspected prior to shipment.
If your application requires operation at a particular temperature, flow, or pressure condition, 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 LAUDA recirculating chiller.
Choosing the Right Recirculating Chiller
Selecting a laboratory chiller requires considering more than its minimum and maximum temperature. Cooling capacity at the intended operating temperature, pump flow, discharge pressure, external-loop resistance, electrical requirements, and the heat generated by connected equipment are all important.
The LAUDA WK1200 is particularly attractive when an application requires both substantial coolant flow and meaningful pump pressure. Its 40 L/min maximum circulation rate and 3.2 bar maximum pressure provide significantly more hydraulic capability than many smaller laboratory chillers.
Its approximately 1.2 kW cooling capacity at 20°C also makes it appropriate for moderate heat loads, while its -10°C minimum operating temperature allows below-ambient cooling when required.
Applications requiring significantly lower temperatures may be better served by a refrigerated circulator designed for deeper subzero operation, while applications with much larger thermal loads may require a higher-capacity process chiller.
American Instrument Exchange can help compare available used and refurbished laboratory chillers based on your target coolant temperature, thermal load, flow requirements, pump pressure, and available electrical service.
What is the temperature range of the LAUDA WK1200?
The LAUDA WK1200 has a working temperature range of approximately -10°C to +40°C, allowing both below-ambient and near-ambient equipment cooling.
How much cooling capacity does the WK1200 provide?
The WK1200 provides approximately 1.2 kW of cooling at 20°C, 1.0 kW at 10°C, and 0.9 kW at 0°C. Cooling capacity decreases as the operating temperature moves farther below ambient.
What is the maximum flow rate of the LAUDA WK1200?
The WK1200 provides a maximum pump flow of approximately 40 L/min, making it a relatively high-flow laboratory recirculating chiller.
What is the maximum pump pressure of the WK1200?
Maximum discharge pressure is approximately 3.2 bar. The system also incorporates an adjustable bypass for pressure limitation.
Can the LAUDA WK1200 be used with a rotary evaporator?
Yes. The WK1200 can provide coolant for compatible rotary evaporator condensers. Its cooling capacity at the desired coolant temperature should be compared with the thermal load of the evaporation process.
Can the WK1200 replace tap-water cooling?
In many compatible applications, yes. The WK1200 continuously refrigerates and recirculates its heat-transfer fluid, potentially eliminating the need to continuously send facility water through laboratory equipment and then to drain.
Is the LAUDA WK1200 suitable for restrictive cooling circuits?
Potentially, yes. Its maximum discharge pressure of approximately 3.2 bar gives the WK1200 considerably more pressure capability than many lower-pressure laboratory chillers. The allowable pressure and required flow of the connected equipment should always be verified before use.
Does this refurbished LAUDA WK1200 include a warranty?
Yes. This used LAUDA WK1200 is refurbished and tested by American Instrument Exchange and includes a 90-day warranty.
CLICK HERE to see the Lauda WK 1200 recirculating chiller 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.
