In a laboratory specialising in construction, quarrying or civil engineering, particle size analysis is one of the most frequently carried out fundamental tests. Whether it is to qualify road aggregates, test concrete sand or verify the particle size distribution of soil, the accuracy of the result depends directly on the efficiency of the sieving process.
Whilst manual sieving is time-consuming and prone to variability, the use of an automatic electromagnetic sieve ensures perfect repeatability and saves technicians a considerable amount of time.
Why choose electromagnetic technology?
Unlike traditional mechanical sieves, electromagnetic sieves operate by means of a controlled three-dimensional action:
- Vertical & 3D elliptical motion: The sample is projected vertically whilst undergoing a slight rotation. This ensures that the grains are optimally aligned with the mesh openings.
- Continuous screen cleaning: High-frequency vibrations prevent the screens from becoming clogged, particularly with fine fractions.
- Precise intensity adjustment: The vibration amplitude can be adjusted according to the nature of the material (soft sand, coarse gravel or recycled aggregates) in order to prevent grain degradation during the test.
Features of the CTRMAT electromagnetic sieve (Ref. CT0407)
Developed to meet the demands of intensive laboratory use, the CT0407 range of sieve shakers stands out for its versatility and robustness:
- Multi-diameter compatibility: Accommodates screen stacks ranging from Ø 200 mm to Ø 315 mm (and up to 400 mm on dedicated models).
- Capacity: Allows you to stack up to 8 to 10 standard sieves, plus the base and lid.
- Built-in digital timer: Precise programming of the test duration to ensure strict compliance with standards.
- Quick-release system: Guide columns and a secure locking handwheel to hold the vibrating screen column firmly in place.
- Compliance with standards: Meets the requirements of standard NF EN 933-1 (Tests to determine the geometric characteristics of aggregates – Determination of particle size distribution).
Improved productivity and comfort in the laboratory
As well as ensuring reliable measurements, equipping your laboratory with an electromagnetic sieve shaker brings tangible benefits in day-to-day operations:
- Time-saving: Whilst the machine is carrying out the automatic sieving cycle, the technician can carry out the weighings or prepare the next samples.
- Durability of the screens: The regular, controlled movement protects the stainless steel mesh and perforated sheets (ISO 3310-1 / ISO 3310-2 standards) against premature wear.
- Soundproof enclosure option: To reduce noise levels in the laboratory when processing heavy aggregates, the sieve can be fitted inside a suitable soundproof enclosure (Ref. CT0407-R).