Julabo FL1703 Recirculating Chiller

Brand : Julabo

Product Code : SKU 1467O CIRC

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JULABO FL1703 Recirculating Chiller

The JULABO FL1703 Recirculating Chiller is a high-performance laboratory cooling system designed for reliable closed-loop temperature control of analytical instruments, chemical processes, reactors, condensers, and other heat-generating laboratory equipment. With a working temperature range of approximately -20°C to +40°C, up to 1.7 kW of cooling capacity at +20°C, circulation flow up to 40 L/min, and adjustable pump pressure from approximately 0.5 to 3 bar, the FL1703 provides significantly greater cooling and circulation capability than smaller benchtop laboratory chillers.

Available used and refurbished from American Instrument Exchange, the JULABO FL1703 provides a cost-effective alternative to purchasing a new high-capacity recirculating chiller. Each unit is inspected and tested for refrigeration, circulation, temperature control, and overall operating performance before shipment. A 90-day warranty is included.

Key Features

-20°C to +40°C working temperature range
1.7 kW cooling capacity at +20°C
Cooling capacity remains approximately 1.0 kW at 0°C
±0.5°C temperature stability
Maximum circulation flow approximately 40 L/min
Adjustable pump pressure from approximately 0.5 to 3 bar
12–17 L filling volume
Stainless-steel reservoir
Microprocessor PID temperature control
0.1°C setting and display resolution
RS232 interface
Visual and audible low-level protection
Space-efficient under-bench configuration
Refurbished and tested by American Instrument Exchange
90-day warranty included

Overview

The JULABO FL1703 is a refrigerated recirculating chiller designed primarily to remove heat from compatible external laboratory and process equipment. Temperature-controlled fluid is pumped from the chiller through the connected equipment, absorbs process heat, and then returns to the FL1703, where the refrigeration system removes the accumulated heat before recirculating the fluid.

This closed-loop arrangement provides a reusable source of temperature-controlled coolant and can eliminate or substantially reduce reliance on continuous laboratory tap-water cooling. It can also provide more consistent coolant temperature and circulation conditions than building water supplies that fluctuate with season or facility demand.

The FL1703 occupies an important position between compact instrument chillers and larger industrial process-cooling systems. Its combination of substantial refrigeration capacity and strong pump performance makes it useful for analytical equipment as well as more demanding laboratory processes.

JULABO also designed the FL1703 for installation beneath a laboratory bench. The unit does not require side ventilation openings, helping laboratories conserve valuable working space while maintaining access to controls and service points.

Key Specifications

Specification	Details
Manufacturer	JULABO
Model	FL1703
Equipment Type	Refrigerated recirculating chiller
Working Temperature Range	-20°C to +40°C
Temperature Stability	±0.5°C
Setting Resolution	0.1°C
Display Resolution	0.1°C
Cooling Capacity at +20°C	1.7 kW / 1,700 W
Cooling Capacity at +10°C	1.4 kW / 1,400 W
Cooling Capacity at 0°C	1.0 kW / 1,000 W
Cooling Capacity at -10°C	0.75 kW / 750 W
Cooling Capacity at -20°C	0.30 kW / 300 W
Maximum Pump Flow	Approx. 40 L/min
Pump Pressure	Approx. 0.5–3 bar, adjustable
Filling Volume	Approx. 12–17 L
Reservoir Material	Stainless steel
Pump Connections	G¾
Temperature Controller	Microprocessor PID
Interface	RS232
Refrigeration	Single-stage, air-cooled
Approximate Dimensions	19.7"W × 29.9"D × 25.2"H
Approximate Weight	200.6 lb / 91 kg
Electrical Requirements	Verify individual unit nameplate
Warranty	90 days

Common Applications

The JULABO FL1703 is suitable for laboratory and process applications requiring continuous removal of moderate to substantial heat loads. Typical uses include reactor temperature control, rotary evaporator and condenser cooling, analytical instrument cooling, vacuum equipment, distillation systems, chemical reaction control, materials testing, process-development equipment, laser systems, and other devices designed for external liquid cooling.

Its combination of cooling capacity and pump performance makes the FL1703 particularly useful for equipment that exceeds the capabilities of compact instrument chillers. At +20°C, the unit can remove approximately 1.7 kW of continuous heat while providing circulation flow up to approximately 40 L/min.

The FL1703 can also serve as an alternative to once-through facility water. Rather than continuously drawing and discharging fresh water, the chiller recirculates the same heat-transfer fluid through a closed cooling loop.

Ideal Laboratory Types

The JULABO FL1703 is well suited for pharmaceutical and biotechnology laboratories, chemistry and chemical-development groups, analytical laboratories, materials-science facilities, industrial R&D departments, process-development laboratories, pilot laboratories, academic research facilities, and other environments requiring dependable external equipment cooling.

Its under-bench configuration can be especially valuable in laboratories where benchtop space is limited. The relatively high pump pressure also makes the FL1703 useful for cooling circuits with longer tubing runs or greater hydraulic resistance than smaller low-pressure laboratory chillers can effectively support.

Performance & Temperature Stability

The JULABO FL1703 provides a working temperature range of approximately -20°C to +40°C with specified temperature stability of approximately ±0.5°C. A microprocessor PID controller regulates coolant temperature, while the digital display provides 0.1°C resolution.

One of the most important characteristics of the FL1703 is its published cooling-capacity curve. The system provides approximately 1.7 kW at +20°C, 1.4 kW at +10°C, 1.0 kW at 0°C, 750 W at -10°C, and 300 W at -20°C.

This distinction is important when sizing a recirculating chiller. A process generating a continuous 1 kW heat load may be compatible with the FL1703 around 0°C but would substantially exceed its available refrigeration capacity at -20°C. Buyers should therefore compare their heat load with the chiller's capacity at the actual required operating temperature rather than relying only on the maximum 1.7 kW rating.

The FL1703 also provides maximum circulation flow of approximately 40 L/min with adjustable pump pressure from approximately 0.5 to 3 bar. This combination allows the system to support a wide variety of external cooling circuits.

Actual delivered flow depends on tubing diameter and length, fittings, coolant viscosity, operating temperature, elevation changes, and resistance within the connected equipment.

Refurbishment & Testing

This used JULABO FL1703 Recirculating Chiller is refurbished and tested by American Instrument Exchange before shipment. Our technicians inspect the compressor, condenser, refrigeration circuit, circulation pump, stainless-steel reservoir, PID controller, display, fluid-level system, external connections, electrical components, housing, and applicable safety systems.

Temperature-controlled equipment is tested using NIST-traceable probes and data loggers. The FL1703 is operated under simulated laboratory conditions to evaluate temperature pull-down, refrigeration performance, circulation, temperature regulation, controller operation, alarms, and overall system reliability.

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

Customers purchasing the FL1703 for a specific instrument or process are encouraged to provide the required coolant temperature, approximate heat load, minimum flow, pressure requirements, and intended heat-transfer fluid. When practical, American Instrument Exchange can incorporate customer-requested operating conditions into final testing.

A 90-day warranty is included.

Shipping & Installation

The JULABO FL1703 is a substantial floor-standing or under-bench chiller weighing approximately 200 lb. American Instrument Exchange prepares the unit for commercial freight shipment with appropriate protection for the refrigeration system, controls, housing, and fluid connections.

The cooling circuit should be drained before transportation and filled with an appropriate heat-transfer fluid after installation. Fluid selection should be based on the intended operating temperature and JULABO's compatibility requirements, particularly for operation below the freezing point of water.

Installation should provide appropriate clearance for the chiller's designed airflow and convenient access to the reservoir, drain, controls, and external circulation connections.

Before connecting the FL1703 to laboratory equipment, users should confirm the required coolant temperature, flow, pressure, heat load, hose size, and fluid compatibility. The adjustable pump pressure should be set appropriately for the connected equipment rather than automatically operated at maximum pressure.

Related Equipment

American Instrument Exchange stocks a range of laboratory circulators, including JULABO recirculating chillers, refrigerated circulating baths, heated circulators, immersion coolers, and process temperature-control systems. Laboratories using the FL1703 may also require laboratory water baths, reactors and fermenters, evaporators and extractors, or other refurbished laboratory equipment.

JULABO FL1703 Frequently Asked Questions

What is the temperature range of the JULABO FL1703?

The JULABO FL1703 has a working temperature range of approximately -20°C to +40°C. An appropriate heat-transfer fluid should be used when operating at subzero temperatures.

How much cooling capacity does the JULABO FL1703 provide?

Cooling capacity depends on coolant temperature. JULABO specifies approximately 1.7 kW at +20°C, 1.4 kW at +10°C, 1.0 kW at 0°C, 750 W at -10°C, and 300 W at -20°C.

How much heat can the FL1703 remove at 0°C?

The FL1703 provides approximately 1.0 kW, or 1,000 W, of cooling capacity at a 0°C coolant temperature. This temperature-specific capacity is more useful for sizing an application than the maximum 1.7 kW rating when the process must operate near freezing.

What is the temperature stability of the FL1703?

JULABO specifies temperature stability of approximately ±0.5°C.

What is the maximum flow rate of the JULABO FL1703?

The FL1703 provides maximum circulation flow of approximately 40 L/min. Actual flow through connected equipment will depend on the resistance of the complete cooling circuit.

Is the pump pressure adjustable?

Yes. Pump pressure is adjustable from approximately 0.5 to 3 bar. This allows the circulation system to be better matched to the requirements of the connected laboratory equipment.

What is the reservoir capacity of the FL1703?

JULABO specifies a filling volume of approximately 12–17 L. The reservoir is constructed from stainless steel.

Can the JULABO FL1703 be used to cool a laboratory reactor?

Yes, provided the reactor's required coolant temperature, heat load, flow, and pressure fall within the FL1703's capabilities. The complete cooling-capacity curve should be considered when sizing the chiller for reactor applications.

Can the FL1703 be used with a rotary evaporator?

Yes. The FL1703 can provide recirculating coolant for compatible rotary evaporator condensers. Its 1.7 kW cooling capacity at +20°C also gives it considerably more heat-removal capability than many small benchtop chillers.

Can the FL1703 replace tap-water cooling?

For compatible equipment, yes. The FL1703 recirculates coolant through a closed loop, which can significantly reduce water consumption compared with continuously supplying equipment with fresh facility water.

Can the JULABO FL1703 operate continuously?

Yes. The FL1703 was designed for continuous laboratory and process cooling applications when properly installed, filled, and operated within its specified conditions.

Does the FL1703 have computer connectivity?

Yes. The FL1703 includes an RS232 interface for compatible external communication and control applications.

Can the JULABO FL1703 be installed under a laboratory bench?

Yes. Its configuration was designed for under-bench installation, and the absence of side ventilation openings helps conserve laboratory space. Proper airflow and service access should still be maintained.

Is the JULABO FL1703 still manufactured?

The FL1703 is a discontinued JULABO model. Used and refurbished FL1703 chillers can remain a practical option for laboratories that need its combination of cooling capacity, pump performance, and temperature range without purchasing a new process chiller.

Does this refurbished JULABO FL1703 include a warranty?

Yes. This used JULABO FL1703 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.