Labline 3520 Orbital Shaker

Brand : Labline

Product Code : SKU 4826A SHAKER

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Lab-Line 3520 Orbital Shaker

The Lab-Line 3520 Orbital Shaker is a durable benchtop platform shaker designed for cell culture, bacterial suspensions, solubility studies, extraction procedures, staining and destaining, washing, sample preparation, and general laboratory mixing. With a 40–400 rpm speed range, 3/4-inch orbital motion, and compact 12 × 12-inch platform, the Model 3520 provides versatile orbital agitation without requiring the bench space of a larger laboratory shaker.

Available used and refurbished from American Instrument Exchange, this Lab-Line 3520 Orbital Shaker is inspected, cleaned, and tested prior to shipment. The unit includes a 90-day warranty from American Instrument Exchange.

Key Features

Compact benchtop orbital shaker
40–400 rpm speed range
3/4-inch / 19 mm orbital motion
12 × 12-inch platform
Solid-state speed control
Analog speed display
1–60 minute timer
Continuous-operation mode
Counterbalanced drive mechanism
Nine sealed, permanently lubricated platform bearings
Interchangeable platform design
Compatible with multiple vessel clips and platform configurations
Heavy cast-iron drive base
120 V, 50/60 Hz operation
Refurbished and tested by American Instrument Exchange
90-day warranty included

Overview

The Lab-Line 3520 is a compact, general-purpose orbital shaker built around a mechanically robust platform and drive system. Its 40–400 rpm operating range and 3/4-inch circular motion allow it to accommodate a broad range of biological, chemical, and sample-preparation procedures.

A solid-state speed control regulates the orbital speed, while the Model 3520 uses an analog meter scale for speed indication. A built-in timer allows shaking periods from 1 to 60 minutes, with a continuous mode available for procedures requiring longer operation.

The shaker's drive mechanism is counterbalanced to promote smooth orbital movement, and the platform rotates on nine sealed, permanently lubricated ball bearings. The drive is housed within a precision-machined cast-iron base supported by cushioned feet to help maintain stability during operation.

Interchangeable platforms and vessel clips allow the shaker to be configured for different laboratory containers rather than limiting it to one fixed vessel arrangement.

Key Specifications

Specification	Details
Manufacturer	Lab-Line Instruments
Model	3520
Equipment Type	Orbital platform shaker
Motion	Circular / orbital
Speed Range	40–400 rpm
Orbit	3/4 in. / approx. 19 mm
Platform Size	12 × 12 in.
Speed Control	Solid-state
Speed Display	Analog meter scale
Timer	1–60 minutes
Continuous Operation	Yes
Platform Design	Interchangeable
Dimensions	Approx. 11"W × 13.5"D × 7"H
Net Weight	Approx. 34 lb / 15.4 kg
Power Consumption	100 W
Electrical	120 VAC, 50/60 Hz
Condition	Used / Refurbished
Warranty	90 days from American Instrument Exchange

Maximum safe operating speed depends on the installed platform, vessel configuration, total load, liquid characteristics, and intended application. Users should operate the shaker only at speeds that maintain stable movement without vessel contact, sample ejection, or excessive vibration.

Common Applications

The Lab-Line 3520 can support cell culture research, bacterial suspension preparation, microbial culture procedures, solubility studies, extraction procedures, staining and destaining, washing procedures, reagent mixing, sample preparation, and other laboratory processes requiring controlled orbital movement.

Its combination of a 3/4-inch orbit and speeds up to 400 rpm provides useful flexibility for both moderate and relatively vigorous agitation. The actual mixing conditions experienced by a sample will depend on vessel geometry, liquid volume, speed, platform configuration, and other application-specific factors.

Ideal Laboratory Types

The Lab-Line 3520 is well suited for biotechnology laboratories, microbiology facilities, molecular biology groups, pharmaceutical research laboratories, academic and university laboratories, clinical research facilities, environmental laboratories, industrial laboratories, and quality-control operations.

Its compact footprint can be particularly useful in laboratories that need dependable orbital shaking capability without dedicating a large amount of bench space to the instrument.

Shaking Performance & Orbital Motion

The Lab-Line 3520 operates from approximately 40 to 400 rpm with a 3/4-inch orbital motion. A counterbalanced drive mechanism is designed to produce smooth, uniform orbital movement across the platform.

The platform is supported by nine sealed and permanently lubricated ball bearings, while the drive assembly is housed within a substantial cast-iron base. Cushioned feet help stabilize the instrument and reduce movement of the shaker itself during operation.

Maximum safe speed is application dependent. Heavier loads, unusual vessel arrangements, certain liquid characteristics, or poorly balanced samples may require operation below the shaker's 400 rpm maximum.

Users should therefore select a speed that maintains stable platform operation and prevents vessels from contacting one another or liquids from being expelled from their containers.

When transferring a procedure from another orbital shaker, both shaking speed and orbit should be considered. The Lab-Line 3520's 3/4-inch orbit may produce different mixing conditions from smaller- or larger-orbit shaker designs even when operated at the same rpm.

Platform, Flask & Vessel Compatibility

The AIE Lab-Line 3520 is equipped with a 12 × 12-inch platform. Lab-Line designed this shaker family around interchangeable platforms and offered a variety of vessel clips to accommodate different laboratory applications.

Depending on the platform and accessories installed, the shaker can be configured for Erlenmeyer flasks, bottles, culture vessels, dishes, and other suitable laboratory containers.

Actual vessel capacity should be determined from the platform and clips installed on the specific AIE unit rather than from a generalized flask-count specification. Flask diameter, clamp arrangement, working volume, total sample weight, operating speed, and load distribution can all affect practical capacity.

Customers planning to use a particular flask, bottle, culture vessel, or other container can contact American Instrument Exchange to confirm the platform and accessories included with the individual shaker.

Refurbishment & Testing

Used Lab-Line 3520 Orbital Shakers from American Instrument Exchange are inspected and tested prior to shipment. The shaking mechanism is operated for extended periods to verify reliable orbital movement and appropriate response across applicable speed settings.

Testing includes evaluation of the drive mechanism, solid-state speed control, analog speed indication, timer, continuous-operation mode, platform movement, and other applicable mechanical and electrical components. The shaker is also cleaned and cosmetically prepared as appropriate before shipment.

Customers with specific operating requirements are encouraged to discuss them with American Instrument Exchange before shipment. When practical, AIE can simulate typical intended operating conditions to help verify shaker performance for the customer's anticipated application.

Shipping & Installation

The Lab-Line 3520 measures approximately 11 inches wide by 13.5 inches deep by 7 inches high and weighs approximately 34 lb.

Despite its compact dimensions, the shaker incorporates a substantial cast-iron drive base. It should be positioned on a sturdy, level laboratory bench with sufficient clearance for the orbital movement of the platform, vessels, clamps, and other installed accessories.

Manufacturer instructions call for at least one inch of clearance around the shaker to permit unobstructed orbital movement. Loads should be distributed as evenly as practical, and vessels should be securely attached before operation.

The Model 3520 is configured for 120 VAC, 50/60 Hz operation with approximately 100 W power consumption.

Related Equipment

Laboratories using the Lab-Line 3520 may also require incubators, CO2 incubators, centrifuges, water baths, laboratory refrigerators, laboratory freezers, balances, and other laboratory shakers. American Instrument Exchange supplies used and refurbished laboratory equipment for biotechnology, pharmaceutical, academic, clinical, and industrial research laboratories.

Frequently Asked Questions

What type of shaker is the Lab-Line 3520?

The Lab-Line 3520 is a compact benchtop orbital platform shaker designed for culture, mixing, extraction, staining, washing, and other laboratory procedures requiring controlled orbital agitation.

What is the speed range of the Lab-Line 3520?

The Model 3520 operates from approximately 40 to 400 rpm.

What is the orbit diameter?

The Lab-Line 3520 uses a 3/4-inch, or approximately 19 mm, circular orbital motion.

How large is the platform?

The AIE unit is equipped with a 12 × 12-inch platform.

Does the Lab-Line 3520 have a timer?

Yes. The built-in timer can be set from 1 to 60 minutes. The shaker can also be operated continuously.

What is the difference between the Lab-Line 3518 and 3520?

The models have essentially the same shaking characteristics and are both 120 V units. One of the primary differences is speed indication: the Model 3518 uses a large LED speed display, while the Model 3520 uses an analog meter scale.

Does the Lab-Line 3520 have interchangeable platforms?

Yes. Lab-Line designed this shaker family for interchangeable platforms and offered a variety of vessel clips and platform configurations for different laboratory applications.

How many flasks can the Lab-Line 3520 hold?

There is no single flask count that applies to every Model 3520. Capacity depends on the platform and clips installed, flask dimensions, working volume, operating speed, total load, and load distribution.

Can the Lab-Line 3520 operate at 400 rpm with any load?

No. Although its nominal speed range extends to 400 rpm, the manufacturer states that maximum safe speed depends on load, the physical and chemical characteristics of the liquids being mixed, and the application. Heavy or unstable configurations may require a lower operating speed.

Can the Lab-Line 3520 be used for bacterial culture?

Yes. Its 40–400 rpm speed range and 3/4-inch orbit make it suitable for many bacterial suspension and microbial culture applications when equipped with appropriate vessel clips and operated under suitable conditions.

Is the Lab-Line 3520 a digital shaker?

No. The Model 3520 uses an analog meter scale for speed indication. The related Lab-Line 3518 uses an LED speed display.

What electrical service does the Model 3520 require?

The Lab-Line 3520 is a 120 VAC, 50/60 Hz shaker rated at approximately 100 W.

How does American Instrument Exchange test the Lab-Line 3520?

AIE operates the shaker for extended periods and checks applicable speed settings, orbital movement, timer operation, continuous mode, controls, and other mechanical and electrical functions prior to shipment.

Does this Lab-Line 3520 include a warranty?

Yes. This used and refurbished Lab-Line 3520 Orbital Shaker includes a 90-day warranty from American Instrument Exchange.

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.