Lauda WKL600 Recirculating Chiller

Brand : Lauda

Product Code : SKU 1506L CIRC

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LAUDA WKL600 Recirculating Chiller

The LAUDA WKL600 is a laboratory recirculating chiller designed to provide reliable cooling and temperature-controlled fluid circulation for laboratory instruments, research equipment, and process applications. With an operating temperature range of -25°C to +40°C, 0.65 kW of cooling capacity at 20°C, and a circulation pump capable of delivering up to 30 L/min, the WKL600 provides a practical dedicated cooling source for a variety of laboratory systems.

Available used and refurbished from American Instrument Exchange, the LAUDA WKL600 is an older-generation recirculating chiller that remains useful for laboratories requiring dependable process cooling without the cost of purchasing a new system. Its air-cooled refrigeration system eliminates the need for condenser cooling water, while its 12 L maximum filling volume and external circulation capability make it suitable for continuous laboratory cooling applications. A 90-day warranty is included.

Key Features

-25°C to +40°C working temperature range
0.65 kW cooling capacity at 20°C
Maximum circulation flow of 30 L/min
Maximum pump pressure of 1.0 bar
Maximum filling volume of 12 L
Air-cooled refrigeration system
Designed for external laboratory and process cooling
Suitable as an alternative to tap-water cooling for compatible equipment
Used, refurbished, and tested by American Instrument Exchange
90-day warranty included

Overview

The LAUDA WKL600 is a refrigerated recirculating chiller designed primarily to remove heat from externally connected laboratory equipment. The system combines refrigeration, a fluid reservoir, temperature control, and a circulation pump in a self-contained unit capable of supplying a continuous stream of temperature-controlled coolant.

Unlike a conventional laboratory water bath, where samples are typically placed directly into a temperature-controlled reservoir, the WKL600 is intended primarily to circulate coolant through external equipment. This makes it useful for instruments and processes that continuously generate heat and require a reliable cooling source.

The WKL600 can also provide an alternative to once-through tap-water cooling. In suitable applications, recirculating coolant reduces dependence on facility water while providing greater control over coolant temperature and circulation conditions.

Although the WKL600 is an older LAUDA platform, its straightforward design and useful cooling and pump specifications can still make it a practical choice for laboratories seeking a cost-effective refurbished recirculating chiller.

Key Specifications

Specification	Details
Manufacturer	LAUDA
Model	WKL600
Equipment Type	Recirculating chiller
Working Temperature Range	-25°C to +40°C
Ambient Temperature Range	+5°C to +40°C
Temperature Control	±1.0°C
Cooling Capacity at 20°C	0.65 kW
Maximum Pump Flow	30 L/min
Maximum Pump Pressure	1.0 bar
Maximum Filling Volume	12 L
Condenser	Air-cooled
Exterior Dimensions	350 × 480 × 595 mm
Exterior Dimensions, Approx.	13.8 in. W × 18.9 in. D × 23.4 in. H
Application	External cooling and fluid circulation
Warranty	90 days

Common Applications

The LAUDA WKL600 can support a wide variety of laboratory equipment requiring continuous cooling or controlled coolant circulation. Typical applications include rotary evaporators, analytical instruments, refractometers, distillation systems, cooling traps, electron microscopes, X-ray equipment, and other instruments that generate heat during operation.

The WKL600 can also be used as part of a centralized cooling-water system for compatible laboratory equipment. Recirculating a controlled volume of coolant can provide an alternative to continuously sending facility water through laboratory instruments and then to drain.

Because cooling requirements vary substantially between instruments, users should compare the WKL600's available cooling capacity, temperature range, pump flow, and pressure with the requirements of the equipment being connected.

Ideal Laboratory Types

The LAUDA WKL600 is suitable for chemistry laboratories, pharmaceutical and biotechnology facilities, analytical laboratories, materials-science groups, industrial research facilities, quality-control laboratories, academic research departments, and other environments requiring dedicated equipment cooling.

Its relatively straightforward recirculating-chiller configuration can be particularly useful for laboratories replacing an older cooling system or seeking a cost-effective dedicated coolant source for existing analytical or process equipment.

Temperature Control & Stability

The WKL600 provides a working temperature range from -25°C to +40°C with specified temperature control of approximately ±1.0°C. This range allows the chiller to provide both below-ambient refrigeration and controlled cooling near ambient temperatures.

Cooling capacity is approximately 0.65 kW at a circulating-fluid temperature of 20°C. As with other refrigerated circulators and chillers, available cooling capacity changes with operating temperature. Buyers should therefore evaluate the thermal load generated by the connected equipment at the intended coolant temperature rather than selecting a chiller based only on its minimum temperature specification.

For applications requiring substantially tighter temperature stability or highly dynamic temperature control, a newer-generation laboratory circulator may be more appropriate. For general equipment cooling and heat-removal applications, however, the WKL600 offers useful performance across a broad range of laboratory conditions.

Circulation & Pump Performance

The LAUDA WKL600 provides a maximum circulation flow rate of 30 L/min and maximum pump pressure of 1.0 bar. These specifications allow the chiller to circulate coolant through a range of compatible external laboratory instruments and process systems.

Actual flow at the connected equipment will depend on the complete fluid circuit. Tubing diameter and length, fittings, elevation, coolant viscosity, operating temperature, and internal restrictions within the connected instrument can all reduce flow from the pump's maximum rating.

Before connecting the WKL600, laboratories should verify the allowable pressure and required flow of the equipment being cooled. Proper tubing selection and installation can help maximize heat-transfer performance while avoiding unnecessary restrictions in the circulation loop.

Refurbishment & Testing

This used LAUDA WKL600 is refurbished and tested by American Instrument Exchange before shipment. Our technicians inspect the refrigeration, circulation, temperature-control, electrical, and user-interface systems and operate the unit to confirm proper functionality.

Temperature-controlled equipment is tested using NIST-traceable probes and data loggers. The pump is evaluated for proper operation and circulation, while the refrigeration system is operated to confirm that the chiller reaches and maintains appropriate temperatures. The reservoir and fluid-contact areas are cleaned and the system is prepared for shipment following testing.

If your application requires operation at a particular coolant temperature or under specific conditions, 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

When selecting a laboratory recirculating chiller, four specifications are particularly important: target coolant temperature, required cooling capacity, circulation flow, and pump pressure. The connected equipment's heat output should be compared with the chiller's available cooling capacity at the intended operating temperature.

The WKL600 is particularly appropriate for moderate cooling loads that fall within its -25°C to +40°C operating range and 0.65 kW cooling capacity at 20°C. Its 30 L/min maximum flow rate also provides substantial fluid circulation for compatible external equipment.

Laboratories requiring much higher heat-removal capacity, extremely tight temperature stability, very low operating temperatures, or sophisticated programmable control may benefit from a newer or higher-capacity circulator. For many straightforward instrument-cooling applications, however, a refurbished WKL600 can provide a cost-effective alternative to purchasing a new recirculating chiller.

American Instrument Exchange can help compare available used and refurbished laboratory circulators based on your required temperature, heat load, pump requirements, and application.

Related Equipment

American Instrument Exchange stocks a range of laboratory circulators, including refrigerated circulators, heating circulators, recirculating chillers, and other temperature-control systems. Laboratories using the WKL600 may also require laboratory water baths, evaporators and extractors, reactors and fermenters, or other refurbished laboratory equipment.

LAUDA WKL600 Frequently Asked Questions

What is the temperature range of the LAUDA WKL600?

The LAUDA WKL600 has a working temperature range of -25°C to +40°C, allowing it to provide refrigerated cooling for a variety of laboratory instruments and processes.

What is the cooling capacity of the LAUDA WKL600?

The WKL600 provides approximately 0.65 kW of cooling capacity at a circulating-fluid temperature of 20°C. Available cooling capacity varies with operating temperature and conditions.

What is the maximum flow rate of the WKL600?

The circulation pump provides a maximum flow rate of approximately 30 L/min with a maximum pump pressure of 1.0 bar. Actual flow through connected equipment depends on the hydraulic resistance of the complete circulation loop.

Can the WKL600 replace tap-water cooling?

For compatible applications, yes. A recirculating chiller can provide a closed-loop source of temperature-controlled coolant rather than continuously using facility water and sending it to drain. The chiller's cooling capacity and pump performance should first be compared with the requirements of the equipment being cooled.

Can the LAUDA WKL600 be used with a rotary evaporator?

Yes, provided the cooling requirements of the particular rotary evaporator and condenser are within the WKL600's operating capabilities. Recirculating chillers are commonly used to supply coolant to rotary evaporator condensers.

Is the LAUDA WKL600 still useful even though it is an older model?

Yes. For applications that fall within its temperature, cooling-capacity, and circulation specifications, a properly refurbished WKL600 can still provide a practical dedicated cooling solution. Buyers requiring advanced programming, tighter temperature control, or greater cooling capacity may prefer a newer-generation circulator.

Does this refurbished LAUDA WKL600 include a warranty?

Yes. This used LAUDA WKL600 is refurbished and tested by American Instrument Exchange and includes a 90-day warranty.

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.

Please contact our team at info@americaninstrument.com for more details.

FAQ

Does the equipment come with a warranty?

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.

Sku 1506l circ Open