Test sieve shaker for seed analysis

Tuesday May-06 2025  17:25:54

Test sieve shaker for seed analysis is an important equipment for separating and grading seeds in seed analysis, and is widely used in agricultural scientific research and seed quality testing. Its main function is to sieve seeds through sieves of different mesh sizes to evaluate the purity and germination rate of seeds. The equipment is usually equipped with a variety of sieves, and common sieve meshes include 1.0mm, 2.0mm, 3.0mm, etc., which can meet the screening needs of different types of seeds.

What is the purpose of the test sieve shaker for seed analysis?

Seed purity analysis: Through test sieves with different apertures, impurities (such as soil blocks, stones, broken leaves, etc.) and waste seeds (such as immature, damaged, and moldy seeds) in seed samples are separated from pure seeds, so as to calculate the purity of the seeds.

Seed particle size classification: Grading according to seed size is of great significance for seed processing, packaging and sowing. Seeds of different particle sizes may have differences in germination rate, growth potential, etc. Grading can improve the quality and uniformity of seeds, which is conducive to cultivating uniform seedlings.

Working principle of test sieve shaker for seed analysis

Equipment structure: The test sieve shaker for seed analysis is usually composed of a sieve frame (with replaceable meshes), a vibration motor or a mechanical eccentric wheel, a timer and a frame.

Screening method: The motor drives the eccentric wheel or crank connecting rod mechanism to make the screen frame produce high-frequency vibration and a certain amplitude of horizontal or vertical movement. This composite movement can make the seeds evenly distributed on the screen surface and constantly jump and roll, so as to achieve the separation and screening of seeds of different particle sizes.

Operation process: Load the standard screen and add samples; set the time and amplitude; start screening; take samples in layers after stopping.

What are the advantages of using the test sieve shaker for seed analysis?

① Adapt to different types of seed analysis: The needs of seed analysis are diverse, including purity detection, particle size distribution analysis, impurity content determination, etc. Different analysis purposes have different requirements for screening. The test sieve shaker can usually be equipped with multiple layers of screens, and multiple particle sizes can be separated in one operation. By replacing screens of different specifications and adjusting operating parameters, it can flexibly adapt to different analysis needs and meet the standards of various seed quality inspections.

② Efficient separation of difficult-to-handle seeds and impurities: Some seeds have rough surfaces, fluff or special shapes, which are easy to clog on the screen, affecting the separation efficiency. Some impurities, such as fine sand, broken seeds or plant residues, are not significantly different in size from the target seeds and are difficult to separate effectively. The test sieve shaker for seed analysis is usually equipped with a beating device, which can effectively prevent the screen from being blocked, improve the separation effect of difficult-to-handle seeds, and obtain seed samples with higher purity.

③ Improve separation efficiency and accuracy: The test sieve shaker ensures that the seeds are evenly dispersed and fully moved on the screen surface by precisely controlling the vibration frequency, amplitude and screening time, thereby improving the separation efficiency. Its mechanized operation reduces human errors and ensures the accuracy and repeatability of the analysis results. For seeds of different shapes and sizes, sieves of different apertures and types can be selected to achieve fine grading.

④ Achieve standardization and repeatability: When different laboratories or different operators perform seed analysis, the results lack comparability due to inconsistent operating standards. The test sieve shaker for seed analysis can set standardized operating parameters to ensure that each analysis is performed under the same conditions. This helps to establish a unified analysis process, improve the repeatability and comparability of the results, and provide reliable data support for seed quality control and trade.

Parameters of test sieve shaker for seed analysis

Seed type	Screening purpose	Recommended sieve aperture (mm)	Corresponding sieve mesh number (mesh)	Vibration frequency (times/minute)	Amplitude (mm)	Vibration time (minutes)
Wheat	Clarity analysis	1.0-2.0	10-20	150-200	3-5	5-10
	Particle size classification	2.0-3.0	6-10	150-200	3-5	8-12
Corn	Clarity analysis	3.0-5.0	4-6	120-180	4-6	6-10
	Particle size classification	6.0-8.0	3-4	120-180	4-6	8-15
Rice	Clarity analysis	0.5-1.5	12-25	180-220	2-4	5-8
	Particle size classification	1.5-2.5	8-12	180-220	2-4	6-10
Soybean	Purity analysis	4.0-6.0	3-5	120-160	5-7	7-12
	Purity classification	6.0-8.0	3-4	120-160	5-7	8-15
Cabbage (vegetable seeds)	Purity analysis	0.2-0.5	30-60	200-250	1-3	3-6
	Purity classification	0.5-0.8	18-30	200-250	1-3	4-8

Application of test sieve shaker for seed analysis

Seed quality testing: In agricultural research institutions or seed companies, the size, shape and purity of different seeds are screened to ensure that the seeds meet quality standards. Put the seeds to be tested into sieves with different apertures, sieve them through the vibration of the shaker, and quickly obtain the proportion of qualified seeds.

Seed classification research: In the plant breeding laboratory, study the characteristics and classification of different plant seeds. Use the test sieve shaker for seed analysis to separate different types of seeds by size and shape, which is convenient for subsequent characteristic analysis and breeding experiments.

Weed seed separation: In farmland management and ecological research, it is necessary to separate crop seeds from weed seeds. By setting different sieves, the target crop seeds and weed seeds can be effectively separated, providing a basis for subsequent planting and management.

Seed germination rate experiment: In agricultural colleges or laboratories, evaluate the germination ability of seeds. After screening out qualified seeds, germination tests are carried out, and the shaker helps to evenly process the samples and improve the accuracy of germination rate detection.

Seed storage research: In seed storage and preservation research, analyze the changes in seeds under different storage conditions. Screen the seeds with different treatments to evaluate their quality changes after storage and help optimize storage conditions.

In summary, the test sieve shaker for seed analysis is an indispensable equipment in the seed analysis laboratory. It can efficiently and accurately perform seed particle size analysis, impurity separation and classification, providing important support for evaluating seed quality and meeting relevant standards.