Oct 05, 2026
In research, quality control, and production testing involving powders, granules, and raw materials, particle size distribution can directly affect flowability, dissolution rate, mixing uniformity, reaction efficiency, and final product quality.
For laboratories in industries such as chemicals, pharmaceuticals, food, advanced materials, and scientific research, achieving fast, stable, and repeatable particle separation is a fundamental but important task.
A laboratory sieve shaker is designed for exactly this purpose.
By using mechanical vibration, electromagnetic vibration, or multidirectional motion, a sieve shaker moves a sample through a stack of test sieves with different mesh sizes. This allows particles to be classified according to size and helps laboratories determine the percentage of material within different particle-size ranges.
What Is a Laboratory Sieve Shaker?
A laboratory sieve shaker is an instrument used for particle size analysis, grading, and sieve residue testing of powders and granular materials.
In a typical test, several standard test sieves with different aperture sizes are stacked from coarse to fine. The sample is placed on the top sieve.
Once the machine starts, continuous vibration causes the material to move, spread, and pass through the sieve openings.
Larger particles remain on the upper sieves, while smaller particles gradually pass through to the lower layers.
After the sieving process is completed, the material retained on each sieve can be weighed to calculate the percentage of particles within each size range.
Laboratory sieve shakers are commonly used for:
Particle size distribution analysis
Raw material particle size testing
Product quality control
Sieve residue analysis
Impurity ratio testing
New material development
Formulation and process optimization
Compared with manual sieving, a laboratory sieve shaker can improve testing efficiency while reducing operator-dependent variation.
How Does a Laboratory Sieve Shaker Work?
The purpose of a sieve shaker is not simply to make the sieve vibrate.
Its main function is to create an effective particle movement pattern on the sieve surface so that particles can separate efficiently according to size.
During the sieving process, the material usually goes through three basic stages.
1. Sample Dispersion
Vibration helps break up the material bed and spread particles across the sieve surface.
This allows more particles to come into contact with the sieve openings.
2. Passage Through the Sieve Openings
When a particle is smaller than the sieve aperture and approaches the opening at a suitable orientation, it can pass through to the next sieve.
3. Particle Size Classification
As the process continues, particles of different sizes are gradually retained on different sieve levels, producing a classified particle-size distribution.
Different laboratory sieve shakers use different vibration mechanisms.
Some machines use vibration motors to generate mechanical motion, while electromagnetic sieve shakers use an electromagnetic excitation system to create high-frequency reciprocating vibration.
Vibration intensity, sieving time, and particle movement pattern can all influence sieving efficiency and test repeatability.
Why Is Repeatability Important in Laboratory Sieving?
For laboratory testing, simply separating the material is usually not enough.
A more important question is:
Can the same sample produce similar results when tested under the same conditions?
If vibration intensity, sieving time, or operating procedures vary from test to test, the results may also vary significantly.
This is why modern laboratory sieve shakers increasingly use programmable and adjustable operating parameters.
For example, LVOBO laboratory sieving equipment allows users to adjust operating parameters for different materials and store commonly used sieving programs.
When the same material needs to be tested again, operators can quickly recall previously established settings.
This reduces repeated parameter adjustment and helps laboratories create more standardized testing procedures.
Such functionality is particularly useful for R&D laboratories, quality-control laboratories, and companies that perform regular batch testing.
What Materials Can Be Tested with a Laboratory Sieve Shaker?
Laboratory sieving equipment can be used for a wide range of powders and granular materials.
Chemical Materials
Examples include resin powders, pigments, coating powders, chemical raw materials, and functional powders.
Particle size can affect dispersion, reaction performance, processing behavior, and product consistency.
Pharmaceutical and Biopharmaceutical Materials
Drug powders, excipients, and certain granular formulations often require particle size control during development and production.
A controlled particle size distribution can contribute to more consistent product performance.
Food Materials
Flour, starch, seasonings, food additives, sugar powder, and other food powders can be tested for particle size or impurities using laboratory sieving equipment.
Advanced Materials
Applications include metal powders, ceramic powders, battery materials, 3D-printing powders, and other functional materials.
For many of these materials, particle size distribution is closely related to downstream processing performance.
Universities and Research Laboratories
Research institutes and universities can use laboratory sieve shakers for material development, particle analysis, formulation studies, and process validation.
Minerals, grains, plastic granules, and many other particulate materials can also be tested depending on the specific application.
How to Choose the Right Laboratory Sieve Shaker
When selecting a laboratory sieve shaker, it is not enough to compare only machine power or price.
The selection should be based on the sample characteristics and testing requirements.
1. Particle Size Range
First, determine the particle size range that needs to be analyzed.
Different test sieves have different aperture sizes, so the sieve specifications should match the target particle-size range.
For a wide distribution, multiple sieves with different mesh sizes can be stacked together.
2. Sieve Diameter
Standard laboratory test sieves are available in different diameters.
Before selecting a machine, confirm that it is compatible with the test sieve sizes already used in your laboratory or planned for future use.
3. Sample Quantity
The amount of material used in one test may range from only a few grams to several hundred grams or more.
Excessive loading can reduce sieving efficiency, so the machine and sieve diameter should be selected according to the typical sample quantity.
4. Vibration Method
Different vibration systems provide different operating characteristics.
Traditional vibration-motor systems are widely used and suitable for many routine laboratory sieving applications.
Electromagnetic sieve shakers use high-frequency electromagnetic excitation and can be suitable for applications requiring precise vibration control and good repeatability.
5. Adjustable Parameters
Different powders may require different sieving conditions.
A machine that allows users to adjust vibration intensity, operating time, and vibration mode provides greater flexibility for optimizing the process for different materials.
6. Program Storage
If a laboratory regularly tests several standard materials, program memory can significantly improve efficiency.
Operators can save different sieving parameters for different materials and recall them during future tests.
This can also support the development of standardized operating procedures, or SOPs.
Why Are Multiple Test Sieves Important?
Laboratory particle size analysis is usually not just about determining whether particles are “large” or “small.”
The goal is often to understand the full particle size distribution.
For example, a sieve stack may be arranged as follows:
500 μm↓250 μm↓125 μm↓63 μm↓Receiving Pan
After sieving, particles within different size ranges remain on different sieves.
By weighing the material retained on each sieve, the percentage of each fraction can be calculated.
A common calculation is:
Sieve Retention (%) = Weight Retained on the Sieve ÷ Total Sample Weight × 100%
This provides a clearer picture of the particle-size composition of the sample.
For product development and quality control, such data are generally more useful than evaluating powder appearance alone.
How Can You Improve the Reliability of Laboratory Sieving Results?
To obtain more consistent results, important testing conditions should remain as stable as possible.
Recommended practices include:
Use test sieves of the same specification and condition
Maintain a consistent sample weight
Use a fixed sieving time
Keep vibration settings consistent
Prevent excessive sieve blockage
Clean sieves regularly
Establish standard testing programs for recurring materials
Some powders may also be prone to agglomeration, static electricity, or irregular particle behavior.
For these materials, additional optimization of the sieving parameters may be required.
There is no single vibration setting that works perfectly for every powder.
For this reason, establishing a dedicated sieving program for each material through repeated testing can help improve data consistency.
LVOBO Laboratory Sieving Solutions
LVOBO focuses on the development and manufacture of laboratory sieving equipment and related laboratory instruments.
To meet different particle-testing requirements, we provide multiple laboratory sieving solutions, including vibratory sieve shakers and electromagnetic sieve shakers.
LVOBO's latest laboratory vibratory sieve shakers feature touchscreen control and adjustable operating parameters.
Depending on the material, users can adjust forward motion, reverse motion, vertical vibration, operating time, and cycle settings.
The system also supports storing multiple commonly used sieving programs.
When the same or similar material is tested again, operators can quickly recall previous settings, reducing repetitive setup work.
For applications requiring high-frequency vibration, the LVOBO BO-300ESS Electromagnetic Sieve Shaker uses an electromagnetic excitation system to generate high-frequency reciprocating motion.
Its vibration amplitude, vibration interval, and sieving time can be adjusted according to different testing requirements.
Different sieving technologies are suitable for different laboratory conditions.
For this reason, we recommend selecting a sieve shaker based on the sample type, target particle size, sieve specifications, sample quantity, and testing workflow rather than evaluating the machine only by power or vibration amplitude.
Conclusion
Particle size is one of the most important basic parameters for powders and granular materials.
A suitable laboratory sieve shaker does more than simply separate particles.
More importantly, it helps laboratories establish a stable and repeatable particle-size testing process.
Before choosing a sieve shaker, consider the following questions:
What material do you need to sieve?
What particle-size range do you need to analyze?
What diameter of standard test sieve will you use?
How much material will you test each time?
Do you need to save and recall sieving programs?
Selecting equipment based on these factors is usually more effective than comparing only power, amplitude, or price.
If you are looking for laboratory sieving equipment for powders, granules, or particle size analysis, contact LVOBO.
Our team can help you select a suitable laboratory sieving solution based on your sample type, sieve specifications, and testing requirements.
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