Vibratory Sieve Shaker

What is the Vibratory Sieve Shaker?

A device that sieves ground agricultural samples into defined size fractions by vibration. It is the right choice for verifying grind quality, preparing defined size classes and assessing the particle size distribution.

Overview

The vibratory sieve shaker stacks a set of test sieves in decreasing aperture order and vibrates them horizontally, vertically or with a three-dimensional motion so that particles pass progressively. The retained mass on each sieve is weighed and expressed as a percentage, giving a particle size distribution of the sample. In agricultural laboratories the shaker is used mainly to verify that a ground sample meets the method's particle size requirement, for example that at least 95 percent passes a 1 mm sieve. It also prepares size fractions for separate analysis, such as separating seed or grain sizes for germination or milling tests. Sieves are selected in standard diameters and apertures and must be certified for critical work. Sieve loading is limited by aperture, so large samples are divided first. Thorough cleaning with a brush or ultrasonic bath between samples prevents blinding and carry-over.

How does it work?

Agricultural samples must be reduced to a uniform, representative state before analysis. Grinding uses cutting blades, hammer mills, rotating knives or bead beating with a cryogenic or ambient medium, breaking cell walls and reducing particle size so that extraction is complete and reproducible. For fibrous forage and feed, a hammer mill with a screen controls the final particle size. Rotary and riffle dividers split a flowing or falling stream of material into equal portions, so a subsample reflects the bulk composition even when particles differ in size or density. Sieve shakers classify particles by size with vibratory, tapping or air-jet action, and the retained fractions can be weighed to check grind quality. Blenders and homogenisers mix and disintegrate fresh tissue or slurries for residue and enzyme work. Moisture loss, heat generation and contamination are the main risks to control.

What are the key features?

• Three-dimensional vibration gives efficient, reproducible sieving.
• Stacks of standard sieves produce particle size distributions.
• Verifies ground samples against method particle size limits.
• Removable sieve stacks allow quick changes of aperture range.
• Programmable time and amplitude suit different materials.
• Certified sieves support traceable quality control.

What are the technical specifications?

A typical vibratory sieve shaker configuration offers sieve diameter of 100–300 mm (standard), sieve apertures of 0.02–20 mm range, motion type of Three-dimensional vibration, amplitude of 0–3 mm, adjustable, sieving time of 1–60 min, programmable and sieve stack of Up to 8 sieves plus pan. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Vibratory Sieve Shaker is used in grind quality verification, particle size distribution analysis, seed and grain size classification and feed and fertilizer particle testing. Across the wider Agricultural Sample Preparation class, laboratories also deploy it for plant tissue nutrient analysis, feed and forage composition testing and pesticide residue sample preparation.

Which standards and certifications apply?

Relevant standards and methods include ISO 6498 (feed sample preparation), ISO 11464 (soil pretreatment), ISO 24333 (cereals sampling), ISO 6644 (cereals automatic sampling) and EN 14780 (solid biofuels). Certification candidates for this model are CE and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Clean equipment thoroughly between samples with brushes and, where needed, solvent or dilute acid, and run blank grinds to detect carry-over of previous samples. Keep grinding brief or cooled to avoid heat that degrades proteins, sugars and volatile compounds, and weigh samples quickly to limit moisture change. For trace analysis, control contamination from blades, sieves and containers, and use appropriate reference materials. Verify grind quality by sieving a subsample and checking that the specified fraction meets the method requirement, and retain a portion of the prepared sample for repeat analysis. Log sample identity, preparation method, particle size and operator, and store prepared samples in sealed containers at the temperature the method requires.

How do I select the right Vibratory Sieve Shaker?

Select the sieve shaker when particle size must be verified or classified for method compliance or product specification. For breakdown by airflow rather than size, an air-jet sieve is an alternative. In an RFQ, specify sieve diameters, aperture range, sample mass and whether wet sieving is needed.

How does it compare with other Agricultural Sample Preparation variants?

Begin with the analytical method, because it fixes the required particle size, sample mass and freedom from contamination. For trace element work, choose grinding surfaces that do not release the elements of interest, such as agate, zirconia or PTFE, and avoid stainless steel when chromium or nickel is measured. For fresh plant tissue and residue analysis, a cryogenic or high-speed homogeniser preserves labile compounds. For fibrous forage and feed, select a hammer mill with the screen size specified by the reference method, and add a divider so that the ground material can be reduced without segregation. Use a sieve shaker to verify grind quality and to prepare defined size fractions. Consider throughput, cleaning between samples, dust control and the risk of moisture change, and confirm that the equipment can meet the standard sample preparation procedure for the analysis planned.