PRO Scientific VSOS-4P Programmable Orbital Shaker

Brand : pro scientific

Product Code : SKU 4825S SHAKER

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PRO Scientific VSOS-4P Programmable Orbital Shaker

The PRO Scientific VSOS-4P Programmable Orbital Shaker is a high-capacity digital laboratory shaker designed for cell and tissue culture, hybridization, staining and destaining, microbial culture, sample preparation, extraction, and other applications requiring controlled orbital agitation. With a 20–300 rpm speed range, 3/4-inch / 19 mm orbital motion, programmable digital controls, and a 12 × 14-inch universal platform, the VSOS-4P combines substantial load capacity with flexible vessel configuration in a compact benchtop system.

Available used and refurbished from American Instrument Exchange, this PRO Scientific VSOS-4P is inspected, cleaned, and tested prior to shipment. The unit includes a 90-day warranty from American Instrument Exchange.

Key Features

Programmable digital orbital shaker
20–300 rpm speed range
Speed adjustable in 1 rpm increments
3/4-inch / 19 mm orbital motion
12 × 14-inch universal platform
Maximum rated platform capacity up to 110 lb
Stores and recalls up to four operating programs
1–999 minute programmable timer
Continuous-operation mode
Pulse operation for short processing cycles
Digital entry and display of speed and time
Adjustable support-bar system for standard and irregularly shaped vessels
Optional flask clamps available for vessels from 10 mL to 1000 mL
Smooth, reproducible orbital motion
Refurbished and tested by American Instrument Exchange
90-day warranty included

Overview

The PRO Scientific VSOS-4P is designed to provide controlled orbital shaking for laboratories requiring both flexible programming and substantial platform capacity. Unlike basic analog orbital shakers, the VSOS-4P provides digital control of both shaking speed and operating time along with programmable memory for frequently used protocols.

Up to four complete operating programs can be stored and recalled, reducing the need to repeatedly enter commonly used parameters. Speed can be selected in 1 rpm increments from 20 to 300 rpm, while operating time can be programmed from 1 to 999 minutes. Continuous operation is also available for longer experiments and overnight procedures.

The VSOS-4P additionally provides a pulse mode for applications requiring brief periods of orbital agitation.

A universal 12 × 14-inch platform provides substantial usable area for bottles, flasks, dishes, culture vessels, and irregularly shaped containers. An adjustable support-bar system can be used to restrain different vessel configurations, while an optional clamp platform allows the shaker to be configured with dedicated flask clamps.

Key Specifications

Specification	Details
Manufacturer	PRO Scientific
Model	VSOS-4P
Equipment Type	Programmable digital orbital shaker
Motion	Orbital
Speed Range	20–300 rpm
Speed Adjustment	1 rpm increments
Orbit	3/4 in. / 19 mm
Standard Platform	12 × 14 in. universal platform
Maximum Rated Platform Capacity	Up to 110 lb
Programmable Memory	Up to 4 programs
Timer	1–999 minutes
Continuous Operation	Yes
Pulse Operation	Yes
Controls	Digital
Vessel Restraint	Adjustable support-bar system; optional flask clamps
Dimensions	Approx. 10"W × 14"D × 8.7"H
Weight	Approx. 32 lb
Electrical	115 VAC, 50/60 Hz
Manufacturer Part Number	576000-00 for 115 V configuration
Condition	Used / Refurbished
Warranty	90 days from American Instrument Exchange

The manufacturer's 110 lb specification represents the rated platform capacity and should not be interpreted as a guaranteed capacity for any particular number or size of vessels. Actual usable capacity depends on the platform or attachment installed, vessel dimensions, working volume, support-bar or clamp configuration, operating speed, and load distribution.

Common Applications

The PRO Scientific VSOS-4P can support cell and tissue culture, microbial culture, hybridization procedures, staining and destaining gels, sample preparation, extraction, reagent mixing, resuspension, washing procedures, media preparation, and other laboratory applications requiring controlled orbital movement.

The combination of a 19 mm orbit and adjustable speeds up to 300 rpm provides flexibility for applications ranging from moderate mixing to more vigorous agitation.

Programmable operation can be particularly useful in laboratories that routinely repeat standardized procedures. Frequently used speed and time settings can be stored and recalled rather than entered manually for each run.

Ideal Laboratory Types

The VSOS-4P is well suited for biotechnology and pharmaceutical laboratories, molecular biology facilities, microbiology laboratories, cell and tissue culture research groups, academic and university laboratories, clinical research facilities, environmental laboratories, food and beverage testing laboratories, and industrial research or quality-control operations.

Its programmable controls can also make it useful in shared laboratories where repeatable operating parameters are important across multiple users or procedures.

Shaking Performance & Orbital Motion

The PRO Scientific VSOS-4P operates from 20 to 300 rpm with a 3/4-inch / 19 mm orbital motion. Speed can be adjusted digitally in 1 rpm increments, providing considerably more precise setpoint selection than traditional analog shaker controls.

PRO Scientific designed the shaker to provide smooth and uniform orbital movement for repeatable laboratory procedures. The 19 mm orbit provides a useful balance between vigorous sample movement and compatibility with a broad range of laboratory vessels.

Actual mixing performance depends on vessel geometry, working volume, sample characteristics, platform configuration, operating speed, total load, and load distribution. A flask, bottle, tray, or irregular container can behave differently at the same rpm even when positioned on the same shaker.

When transferring a protocol from another orbital shaker, both shaking speed and orbit should therefore be considered rather than relying on rpm alone.

Platform, Flask & Vessel Compatibility

The VSOS-4P was originally supplied with a 12 × 14-inch universal platform featuring a removable neoprene rubber pad and an adjustable support-bar set. The support bars allow users to restrain both conventional laboratory vessels and irregularly shaped containers without requiring dedicated clamps for every application.

PRO Scientific also offered a separate clamp-support platform and dedicated clamps for 10 mL, 25 mL, 50 mL, 125 mL, 250 mL, 500 mL, and 1000 mL vessels.

Manufacturer accessory specifications indicate that flask capacity varies substantially with vessel size and clamp arrangement. Smaller clamps can accommodate many vessels across the platform, while larger flasks require considerably more space.

For this reason, actual flask capacity should be determined from the platform and accessories installed on the specific AIE unit rather than from a single generalized vessel count.

Customers planning to use particular Erlenmeyer flasks, bottles, culture vessels, dishes, trays, or irregularly shaped containers should confirm the platform, support bars, clamps, and other accessories supplied with the individual shaker before purchase.

Programmable Operation & Protocol Control

One of the most useful features of the VSOS-4P is its ability to store up to four complete operating programs. Frequently used shaking conditions can be saved and recalled, helping simplify repetitive laboratory procedures.

Speed is entered digitally from 20 to 300 rpm, while time can be programmed in 1-minute increments for runs lasting up to 999 minutes. Continuous operation is available for procedures extending beyond the timer range or for overnight shaking.

The shaker also provides pulse operation for short processing runs. At the completion of a timed cycle, an audible indicator alerts the operator as the shaker slows to a stop.

These controls make the VSOS-4P particularly useful for laboratories performing repeated protocols where consistent speed and processing time are important.

Refurbishment & Testing

Used PRO Scientific VSOS-4P 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 proper response across applicable speed settings.

Testing includes evaluation of speed adjustment, digital controls, timer operation, continuous mode, programmable memory functions, pulse operation, 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 representative operating conditions to help verify shaker performance for the customer's anticipated application.

Shipping & Installation

The PRO Scientific VSOS-4P measures approximately 10 inches wide by 14 inches deep by 8.7 inches high and weighs approximately 32 lb.

The shaker should be installed on a sturdy, stable, and level laboratory bench with sufficient clearance around the moving platform and installed vessels. Particular attention should be given to platform clearance when using larger bottles, flasks, or irregularly shaped containers.

Loads should be centered and distributed as evenly as practical. Vessels should be securely restrained using the appropriate support bars, clamps, or other accessories before shaking begins.

The 115 V VSOS-4P is designed for 115 VAC, 50/60 Hz electrical service. Electrical requirements should be verified for the specific AIE unit before installation.

Related Equipment

Laboratories using the PRO Scientific VSOS-4P may also require incubators, CO2 incubators, centrifuges, water baths, laboratory refrigerators, laboratory freezers, ultra-low 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 PRO Scientific VSOS-4P?

The VSOS-4P is a programmable digital orbital platform shaker designed for culture, hybridization, staining, extraction, sample preparation, mixing, and other laboratory procedures requiring controlled orbital agitation.

What is the speed range?

The PRO Scientific VSOS-4P operates from 20 to 300 rpm with speed adjustable in 1 rpm increments.

What is the orbit diameter?

The VSOS-4P uses a 3/4-inch / 19 mm circular orbital motion.

How large is the standard platform?

PRO Scientific specifies a 12 × 14-inch universal platform for the VSOS-4P.

What is the maximum platform capacity?

PRO Scientific rated the VSOS-4P for loads up to 110 lb. Actual usable capacity depends on the platform or attachment, vessel configuration, working volume, operating speed, and load distribution.

Does the VSOS-4P store programs?

Yes. Up to four complete operating programs can be stored and recalled, making it easier to repeat commonly used shaking procedures.

Does the VSOS-4P have a timer?

Yes. The timer can be programmed in 1-minute increments for periods up to 999 minutes. Continuous operation is also available.

What is pulse operation?

Pulse operation allows the shaker to perform short processing runs without requiring a longer timed program. This can be useful for brief mixing or resuspension procedures.

What types of vessels can the VSOS-4P accommodate?

The universal platform and adjustable support-bar system can accommodate a variety of bottles, flasks, dishes, trays, and irregularly shaped containers. PRO Scientific also offered a dedicated clamp platform with clamps for vessels ranging from 10 mL to 1000 mL.

How many flasks can the VSOS-4P hold?

Capacity depends on flask size and the platform or clamps installed. PRO Scientific offered multiple clamp sizes, so there is no single flask count that applies to every VSOS-4P configuration.

Can the VSOS-4P be used for cell or tissue culture?

Yes. PRO Scientific specifically identified cell and tissue culture among the intended applications for this shaker. Appropriate vessels, operating speed, and environmental conditions should be selected for the particular culture protocol.

Can the VSOS-4P run overnight?

Yes. Continuous operation is available for extended experiments and overnight shaking procedures.

What happens when a timed run ends?

At the completion of a programmed timed cycle, the shaker provides an audible indication and slows to a stop.

How does American Instrument Exchange test the VSOS-4P?

AIE operates the shaker for extended periods and verifies applicable speed settings, orbital movement, timer operation, programmable memory, pulse and continuous modes, digital controls, and other mechanical and electrical functions before shipment.

Does this PRO Scientific VSOS-4P include a warranty?

Yes. This used and refurbished PRO Scientific VSOS-4P 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.