Burrell 75 Wrist Action Shaker – Used and Refurbished
The Burrell Scientific Model 75 Wrist Action Shaker is a heavy-duty laboratory shaker designed to reproduce the back-and-forth swirling motion of manual wrist shaking. Operating at a fixed rate of approximately 385 oscillations per minute, the Model 75 provides adjustable shaking intensity for mixing liquids, suspensions, and other compatible laboratory samples.
Unlike conventional orbital shakers, the Burrell 75 uses an adjustable lever mechanism to vary the amplitude of its wrist-action movement. Operators can select a gentle swirling action or more vigorous agitation by changing the movement angle without changing the oscillation frequency.
This design makes the Model 75 useful for chemical extraction, dissolution procedures, sample resuspension, general laboratory mixing, and other applications requiring repeated movement of securely clamped vessels.
This Burrell 75, AIE inventory number 4818B, is available used and refurbished from American Instrument Exchange with a 90-day warranty.
Important: This particular unit is offered without shaker arms or vessel clamps. Compatible accessories must be obtained separately before it can be used for vessel shaking.
Key Features
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Burrell Scientific Model 75 Wrist Action Shaker
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Fixed shaking frequency of approximately 385 oscillations per minute
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Adjustable wrist-action movement angle, approximately 1–15°
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Gentle swirling to vigorous agitation through lever adjustment
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Mechanical shaking action designed to simulate manual wrist mixing
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Built-in timer with continuous-operation setting
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Heavy-duty steel and aluminum construction
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Compatible with model-specific shaker arms and vessel clamps
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Suitable for mixing, extraction, dissolution, and sample resuspension
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Used and reconditioned by American Instrument Exchange
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90-day warranty included
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Shaker arms and clamps are not included with AIE unit 4818B
Overview
The Burrell Model 75 is designed for laboratory procedures that benefit from consistent back-and-forth vessel agitation.
Its distinctive wrist-action movement simulates the swirling motion produced when an operator shakes a flask by hand. This provides a different mixing pattern from the circular motion of an orbital shaker or the linear movement of a reciprocating shaker.
The Model 75 maintains a fixed oscillation frequency while allowing the operator to change the angle of movement. Increasing the angle produces greater vessel travel and more vigorous mixing.
With appropriate arms and clamps installed, the shaker can accommodate compatible laboratory vessels for repetitive mixing procedures.
Its mechanical design and continuous-operation capability make it useful for laboratories seeking an alternative to manual shaking.
Common Applications
The Burrell 75 supports liquid-liquid extraction, chemical sample preparation, dissolution procedures, mixing of laboratory reagents, suspension preparation, sample resuspension, environmental testing, analytical chemistry workflows, and other applications requiring repeated agitation of secured vessels.
It may also be useful for compatible biological or industrial laboratory procedures, provided the shaking action is suitable for the samples and containers involved.
Key Specifications
| Specification |
Details |
| Manufacturer |
Burrell Scientific |
| Model |
75 |
| AIE Inventory Number |
4818B |
| Equipment Type |
Wrist Action Laboratory Shaker |
| Shaking Motion |
Back-and-Forth Wrist-Action Swirling |
| Shaking Frequency |
Fixed, 385 Oscillations/Minute |
| Manufacturer Speed Tolerance |
±10% |
| Movement Angle |
Approximately 1–15° |
| Agitation Adjustment |
Mechanical Lever |
| Timer |
AIE Lists Up to 10 Minutes; Verify |
| Manufacturer Model 75 Timer |
0–60 Minutes or Continuous |
| Continuous Operation |
Yes |
| Maximum Tested Load |
10 lb (4.5 kg), Manufacturer Family Rating |
| Construction |
Steel and Aluminum |
| Shaker Arms |
Not Included |
| Vessel Clamps |
Not Included |
| Vessel Capacity |
Depends on Installed Arms and Clamps |
| Electrical Requirements |
Verify Unit Rating Plate |
| Heating or Refrigeration |
None |
| Condition |
Used / Reconditioned |
| Warranty |
90 Days |
The Model 75 was produced in multiple arm and clamp configurations. Overall dimensions, electrical requirements, and vessel capacity depend on the exact configuration. The accessory information above reflects AIE's listing for unit 4818B.
Ideal Laboratory Types
The Burrell 75 is suitable for analytical chemistry laboratories, environmental testing facilities, pharmaceutical research departments, industrial quality-control laboratories, academic research institutions, chemical research facilities, and biotechnology laboratories.
It is particularly useful where repeatable wrist-action mixing is preferred over conventional orbital agitation.
Fixed-Speed Wrist-Action Mixing
The Burrell 75 operates at a nominal frequency of 385 oscillations per minute.
Unlike variable-speed orbital shakers, the Model 75 does not use a speed control to change its mixing intensity.
Instead, the shaker maintains its oscillation frequency while allowing the operator to adjust the movement angle.
This provides a repeatable mechanical mixing action that can be adapted to different vessels and sample types.
The manufacturer specifies a nominal frequency tolerance of ±10%.
Adjustable Agitation from Gentle to Vigorous
The Model 75's adjustable lever mechanism changes the angle through which the shaker moves its vessels.
At smaller angles, the movement produces a relatively gentle swirling action. Increasing the angle increases vessel travel and produces more vigorous agitation.
The adjustment range is approximately 1–15°.
This makes it possible to vary mixing intensity without changing the fixed oscillation frequency.
For laboratories working with different sample volumes or liquid properties, the adjustable movement angle provides useful flexibility.
Wrist-Action vs. Orbital Shaking
A conventional orbital shaker moves its platform in a circular path, making it useful for flasks, microplates, and other vessels positioned on a horizontal platform.
The Burrell 75 uses a wrist-action mechanism that reproduces the back-and-forth swirling movement of manual shaking.
This difference can influence how liquids move within the vessel and how effectively particular samples mix.
The appropriate shaking method depends on vessel shape, sample volume, viscosity, and the desired mixing behavior.
Chemical Extraction and Sample Preparation
Wrist-action shakers are commonly used for suitable chemical extraction and sample preparation procedures.
Repeated agitation helps increase contact between liquid phases or between a liquid and a solid sample.
The Burrell 75 can provide consistent movement for protocols that specify wrist-action shaking.
When using solvents or other chemicals, operators should confirm container compatibility, secure closures, ventilation requirements, and the suitability of the shaker for the application.
The instrument itself does not provide chemical containment or explosion protection.
Sample Resuspension and Reagent Mixing
The Burrell 75 can be used for compatible sample resuspension and reagent mixing procedures.
Continuous agitation may help redistribute settled material and maintain more uniform mixtures during preparation.
The adjustable shaking angle allows the operator to select an appropriate intensity for the sample.
For sensitive biological materials, the suitability of wrist-action movement should be evaluated before use.
Timer and Continuous Operation
The Model 75 incorporates a built-in timer and a continuous-operation setting.
Burrell's published operating manual describes a timer adjustable up to 60 minutes, although AIE's listing for this particular unit specifies up to 10 minutes.
The actual timer range should therefore be verified on inventory unit 4818B.
Continuous operation allows the shaker to run for longer procedures, subject to the manufacturer's operating instructions and appropriate laboratory supervision.
Shaker Arms and Clamp Compatibility
The Burrell Model 75 was manufactured in several configurations designed to accommodate different numbers of vessels.
Compatible shaker arms and clamps are used to secure bottles, flasks, and other suitable laboratory containers.
The type and number of vessels supported depend on the installed arm and clamp arrangement.
For AIE inventory unit 4818B, the listing specifically states that arms and clamps are not included.
Customers should verify the availability of compatible accessories before purchase, particularly when replacing an existing shaker or configuring the instrument for a specific vessel type.
Heavy-Duty Mechanical Construction
The Burrell 75 uses steel and aluminum construction intended for laboratory shaking applications.
Its mechanical design provides a consistent fixed-frequency motion, while the adjustable lever allows the operator to change agitation intensity.
The shaker should be installed on a stable, level surface capable of supporting the instrument and the intended vessel load.
All vessels must be securely clamped, and the total load must remain within the manufacturer's limits.
Refurbishment and Testing by American Instrument Exchange
American Instrument Exchange inspects and tests used laboratory shakers before shipment.
For the Burrell 75, relevant testing includes extended operation of the shaking mechanism, evaluation of the motor and mechanical movement, inspection of the lever adjustment, and verification of timer and continuous-operation functions.
AIE's listing confirms that the shaking mechanism is operated for extended periods during testing.
The unit is cleaned and reconditioned before shipment and includes a 90-day warranty.
Because arms and clamps are not included, customers should confirm the intended accessory configuration before ordering.
Shipping and Installation
The Burrell 75 should be installed on a stable laboratory workbench or other suitable support surface.
Adequate clearance is necessary for the movement of the shaker mechanism and any compatible arms and clamps installed after purchase.
Electrical requirements should be checked against the rating plate on the individual unit.
Before operation, all mounting hardware, arms, clamps, and vessels should be secured, and the shaking angle should be set appropriately for the load.
The unit should not be operated with improperly attached or unbalanced accessories.
Related Equipment
Laboratories using the Burrell 75 may also require other laboratory shakers, laboratory rockers and rotators, laboratory water baths, centrifuges, and laboratory incubators.
American Instrument Exchange supplies used and refurbished shakers, mixers, centrifuges, water baths, and other laboratory instruments for academic, pharmaceutical, chemical, biotechnology, and industrial research facilities.
Burrell Model 75 FAQs
What is the Burrell 75 Wrist Action Shaker?
The Burrell 75 is a fixed-frequency laboratory shaker that simulates manual wrist shaking through an adjustable back-and-forth swirling motion.
What is the shaking speed?
The Model 75 operates at approximately 385 oscillations per minute, with a manufacturer-specified tolerance of ±10%.
Can the shaking intensity be adjusted?
Yes. The movement angle can be adjusted from approximately 1–15° to provide gentler or more vigorous agitation.
Does the shaker have variable speed?
No. The oscillation frequency is fixed. Mixing intensity is adjusted by changing the movement angle.
Are shaker arms and clamps included?
No. AIE inventory unit 4818B is listed without arms or clamps. Compatible accessories must be obtained separately.
What is the timer range?
AIE lists a timer range of up to 10 minutes for this unit, while Burrell's published Model 75 manual specifies up to 60 minutes. The installed timer should be verified before purchase.
Can it be used for chemical extraction?
Yes. The Burrell 75 can support compatible extraction and sample preparation procedures requiring wrist-action agitation, provided appropriate vessels and safety precautions are used.
Does it provide temperature control?
No. The Burrell 75 is a mechanical shaker without integrated heating or refrigeration.
Does the refurbished Burrell 75 include a warranty?
Yes. American Instrument Exchange includes a 90-day warranty.
