NESLAB Exacal EX-200 Precision Recirculating Water Bath

Brand : Neslab

Product Code : SKU 1491O CIRC

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NESLAB Exacal EX-200 Precision Recirculating Water Bath

The NESLAB Exacal EX-200 Recirculating Water Bath is a precision heated laboratory circulator designed for applications requiring highly stable fluid temperature, direct bath access, or temperature-controlled external circulation. With an operating range extending up to 150°C and specified temperature stability of approximately ±0.010°C, the EX-200 was designed for demanding research, analytical, calibration, and process applications where consistent temperature conditions are essential.

Available used and refurbished from American Instrument Exchange, the NESLAB Exacal EX-200 combines an accessible temperature-controlled bath, active fluid circulation, analog temperature controls, and connections for external water cooling. The system can be used for direct immersion applications or to circulate temperature-controlled fluid through compatible external instruments, jacketed vessels, and experimental apparatus. A 90-day warranty is included.

Key Features

Temperature operation up to 150°C
Approximately ±0.010°C temperature stability
Heated recirculating water bath
Active fluid circulation
Direct immersion and external circulation capability
Analog temperature controls
External water-cooling connections
Suitable for water and compatible heat-transfer fluids
Designed for precision constant-temperature applications
Can supply temperature-controlled fluid to external equipment
Straightforward laboratory controls
Compact benchtop design
115 V, 60 Hz electrical configuration
Used, refurbished, and tested by American Instrument Exchange
90-day warranty included

Overview

The NESLAB Exacal EX-200 is a precision constant-temperature bath and circulator from an earlier generation of NESLAB laboratory temperature-control equipment.

Unlike a simple non-circulating water bath, the EX-200 actively circulates its bath fluid. Continuous fluid movement improves heat transfer, reduces temperature gradients within the reservoir, and allows the system to provide temperature-controlled fluid to compatible equipment outside the bath.

The EX-200 is primarily a heated circulator rather than a mechanically refrigerated bath. External cooling-water connections can provide additional heat removal and help the system operate at lower temperatures, but cooling performance depends on the temperature and availability of the external cooling-water source.

At elevated temperatures, compatible heat-transfer fluids can extend operation beyond the practical temperature range of water. The EX-200's upper operating temperature of approximately 150°C makes it useful for applications requiring substantially higher temperatures than conventional laboratory water baths.

Key Specifications

Specification	Details
Manufacturer	NESLAB
Product Line	Exacal
Model	EX-200
Equipment Type	Precision heated recirculating water bath
Published Temperature Range	Approx. 21°C to 150°C
Temperature Stability	Approx. ±0.010°C
Temperature Control	Analog
Heating	Integrated
Mechanical Refrigeration	No
External Cooling	Water-cooling connections
Internal Circulation	Yes
External Circulation	Yes
Bath Fluid	Water or compatible heat-transfer fluid, depending on temperature
Exterior Dimensions	Approx. 13 in. W × 16.5 in. D × 14 in. H
Electrical Requirements	115 V, 60 Hz, single phase
Current	7.5 A
Warranty	90 days

Common Applications

The NESLAB Exacal EX-200 can support a broad range of applications requiring stable and repeatable fluid temperature. Typical uses include sample conditioning, chemical reaction control, calibration work, viscosity measurements, refractometry, physical-property measurements, materials research, jacketed vessel temperature control, and general analytical laboratory procedures.

The EX-200 can also circulate temperature-controlled fluid through compatible external equipment. This makes it useful for water-jacketed reaction vessels, refractometers, optical equipment, heat exchangers, experimental apparatus, and other devices designed for external liquid temperature control.

Its high-temperature capability expands its usefulness beyond conventional water-bath applications. Appropriate heat-transfer fluid can be selected when operating conditions exceed the practical limits of water.

Ideal Laboratory Types

The NESLAB Exacal EX-200 is well suited for chemistry laboratories, pharmaceutical research facilities, analytical laboratories, materials-science groups, calibration laboratories, quality-control departments, industrial R&D facilities, and academic research environments.

Its excellent specified temperature stability makes it particularly appropriate for procedures where small changes in temperature can affect measured physical properties, chemical reactions, analytical results, or calibration accuracy.

The EX-200 can also be useful for laboratories maintaining established methods or experimental systems originally developed around NESLAB constant-temperature baths.

Temperature Control & Stability

The NESLAB Exacal EX-200 is specified for temperature stability of approximately ±0.010°C, making precision temperature control one of the defining characteristics of the system.

Active fluid circulation helps distribute heat throughout the reservoir and minimize temperature gradients. This can provide more consistent conditions around immersed samples while also allowing stable fluid to be supplied to compatible external equipment.

AIE lists a nominal operating range of approximately 21°C to 150°C. The lower end of this range should be considered in the context of the EX-200's cooling arrangement.

The EX-200 does not use an integrated refrigeration system like a refrigerated bath circulator. Instead, external cooling-water connections can assist with heat removal. Actual low-temperature performance therefore depends on the temperature and flow of the available cooling water, ambient conditions, process heat load, and other operating factors.

At higher temperatures, an appropriate heat-transfer fluid should be used. Water should not be assumed to be suitable throughout the complete operating range up to 150°C.

Circulation & External Temperature Control

The NESLAB Exacal EX-200 uses active fluid circulation both to improve temperature distribution within the bath and to support compatible external temperature-control applications.

For direct bath applications, circulation continuously moves fluid around immersed samples and equipment, improving heat transfer and helping the system maintain consistent conditions.

For external applications, temperature-controlled fluid can be circulated through compatible jacketed vessels, analytical instruments, heat exchangers, and experimental equipment before returning to the bath.

Historical scientific literature documents EX-200 systems being used to circulate temperature-controlled water through external experimental apparatus, demonstrating the practical usefulness of the unit as more than a simple immersion bath.

Actual external flow depends on tubing, fittings, fluid viscosity, operating temperature, elevation, and resistance within the connected equipment. Applications requiring a specific flow rate or pressure should have those requirements verified against the individual EX-200 before installation.

Refurbishment & Testing

This used NESLAB Exacal EX-200 Recirculating Water Bath is refurbished and tested by American Instrument Exchange before shipment. Our technicians inspect the heater, circulation system, temperature controller, bath, electrical components, external cooling-water connections, external circulation connections, and associated safety systems.

Temperature-controlled equipment is tested using NIST-traceable probes and data loggers. The EX-200 is operated under simulated laboratory conditions to evaluate heating, circulation, temperature regulation, controller operation, and overall stability.

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

Customers requiring the EX-200 for a specific temperature or external circulation application are encouraged to provide their intended operating conditions before shipment. When practical, American Instrument Exchange can incorporate customer-requested conditions into final testing.

A 90-day warranty is included with this refurbished NESLAB circulating bath.

Choosing the Right Circulator or Water Bath

The NESLAB Exacal EX-200 is particularly appropriate for applications where temperature stability is more important than mechanical refrigeration.

Its approximately ±0.010°C specified stability makes it attractive for precision laboratory procedures, while its 150°C upper temperature capability provides considerably greater flexibility than a basic laboratory water bath.

The EX-200 also offers an advantage over non-circulating baths when temperature-controlled fluid needs to be supplied to external equipment.

However, laboratories requiring reliable subambient operation should carefully consider the cooling method. Because the EX-200 relies on external cooling water rather than an integrated refrigeration system, it does not provide the independent subambient cooling capability of a refrigerated/heated bath circulator.

Applications requiring temperatures substantially below ambient may be better served by a refrigerated circulator, recirculating chiller, or an EX-200 paired with an appropriate external cooling source.

American Instrument Exchange can help compare available laboratory circulators based on temperature range, stability, cooling method, bath requirements, external circulation needs, and intended application.

Related Equipment

American Instrument Exchange stocks a range of laboratory circulators, including NESLAB circulating baths, refrigerated/heated circulators, recirculating chillers, and immersion coolers. Laboratories considering the Exacal EX-200 may also want to compare available laboratory water baths, reactors and fermenters, evaporators and extractors, and other refurbished laboratory equipment.

NESLAB Exacal EX-200 Frequently Asked Questions

What is the temperature range of the NESLAB Exacal EX-200?

The EX-200 is listed with a nominal operating range of approximately 21°C to 150°C. Low-temperature performance depends on ambient conditions and the external cooling-water supply.

How stable is the temperature in the EX-200?

The NESLAB Exacal EX-200 is specified for approximately ±0.010°C temperature stability, making it suitable for precision constant-temperature applications.

Is the NESLAB EX-200 refrigerated?

No. The EX-200 is primarily a heated circulating bath. It has connections for external cooling water but does not use the type of integrated refrigeration system found in a refrigerated bath circulator.

Can the EX-200 circulate fluid through external equipment?

Yes. The EX-200 can circulate temperature-controlled fluid through compatible external equipment such as jacketed vessels, analytical instruments, and experimental apparatus.

Can the EX-200 be used as a conventional water bath?

Yes. Samples and compatible equipment can be temperature controlled directly in the bath. Active circulation improves fluid movement and temperature distribution compared with a basic non-circulating water bath.

Can water be used at 150°C?

No. Water should not be assumed to be suitable throughout the complete operating range. Elevated-temperature operation requires an appropriate heat-transfer fluid selected for the required temperature and laboratory conditions.

What are the electrical requirements of this EX-200?

AIE's unit is listed for 115 V, 60 Hz, single-phase electrical service with a current requirement of approximately 7.5 A.

What types of research used the NESLAB EX-200?

Historical scientific literature documents EX-200 baths being used for applications including controlled-temperature chemical reactions and precision optical/refractometry experiments, demonstrating the system's usefulness for external constant-temperature circulation.

Does this refurbished NESLAB Exacal EX-200 include a warranty?

Yes. This used NESLAB Exacal EX-200 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.