MingShen Science SZH-4 Reciprocating Automatic Sieve Shaker

Overview

The MingShen Science SZH-4 Reciprocating Automatic Sieve Shaker is an electromechanically driven particle size analysis instrument engineered for standardized dry-sieving operations in industrial quality control, geological sample preparation, academic research laboratories, and vocational training environments. It operates on the principle of controlled linear reciprocation—generated via an eccentric shaft mechanism—to impart consistent horizontal oscillatory motion to the sieve stack. This mechanical design ensures uniform energy transfer across the entire sieve surface, minimizing stratification bias and improving reproducibility in granulometric distribution measurements. Unlike rotary or tapping shakers, the SZH-4’s unidirectional 40 mm amplitude at a fixed 240 cycles per minute provides predictable kinetic input suitable for ASTM E11, ISO 3310-1, and GB/T 6003.1-compliant sieve analysis protocols. Its compact footprint and low-voltage electrical architecture make it compatible with standard 220 V / 50 Hz laboratory power infrastructure without requiring dedicated circuits or vibration-isolation mounts.

Key Features

• Reciprocating motion drive system with precision-machined eccentric shaft and reinforced slide rod assembly for long-term mechanical stability
• Digital timer with adjustable range (0–99 minutes) and mechanical lock function to prevent inadvertent setting changes during operation
• Modular sieve tray interface accommodating one or multiple 300 × 220 mm rectangular sieve frames—compatible with standard brass, stainless steel, or nylon mesh sieves (mesh sizes from 20 µm to 125 mm)
• Robust cast-iron base and powder-coated steel frame ensuring structural rigidity and resistance to ambient laboratory corrosion
• Low-noise induction motor (rated 0.37 kW, IP54 protection class) with thermal overload protection and smooth start/stop control
• Ergonomic front-panel layout with illuminated start/stop push-button, timer display, and status indicator LED

Sample Compatibility & Compliance

The SZH-4 is validated for use with dry, free-flowing granular materials including crushed ores, aggregates, soil fractions, powdered chemicals, pharmaceutical excipients, and ceramic raw materials. It is not designed for wet sieving, sticky, fibrous, or electrostatically cohesive samples. When operated within specified parameters and paired with certified test sieves traceable to NIST or CNAS-accredited calibration standards, data generated meets requirements for ISO/IEC 17025 accredited testing laboratories. The device supports documentation workflows aligned with GLP principles—including operator identification, sieve lot tracking, and time-stamped run logs—when integrated with external lab notebooks or LIMS systems. While the unit itself does not incorporate FDA 21 CFR Part 11 electronic signature functionality, its deterministic timing and mechanical repeatability facilitate audit-ready manual recordkeeping.

Software & Data Management

The SZH-4 is a standalone electromechanical instrument with no embedded microprocessor or digital connectivity (e.g., USB, Ethernet, Bluetooth). All operational parameters are set manually via the front-panel timer dial and mechanical lock. Data acquisition and reporting remain external responsibilities: users record sieve weights pre- and post-shaking using calibrated analytical balances (e.g., METTLER TOLEDO XP series), then compute cumulative retained mass percentages according to ISO 9276-2 or USP . For laboratories implementing paperless workflows, the SZH-4 integrates seamlessly with common ELN platforms (e.g., LabArchives, Benchling) via manual entry or CSV import of balance outputs. Optional accessories include a sieve weighing kit with tare trays and a calibration certificate package for periodic verification of amplitude and cycle rate using laser vibrometry or high-speed imaging.

Applications

• Aggregate gradation testing in civil engineering labs per ASTM C136/C136M
• Particle size distribution analysis of mineral concentrates in metallurgical process development
• Soil texture classification (sand/silt/clay separation) in environmental and agricultural research
• Quality assurance screening of catalyst pellets, activated carbon, or filter media
• Teaching fundamental sieving theory and statistical sampling techniques in undergraduate materials science curricula
• Pre-sieving step prior to laser diffraction or dynamic image analysis to remove oversized contaminants

FAQ

What sieve frame dimensions does the SZH-4 support?
It accepts standard 300 × 220 mm rectangular sieve frames, conforming to ISO 3310-1 Annex A specifications.
Can the amplitude or frequency be adjusted?
No—the SZH-4 operates at a fixed mechanical amplitude of 40 mm and nominal frequency of 240 cycles/min; these values are non-variable by design to ensure method consistency.
Is the unit suitable for GMP-regulated pharmaceutical manufacturing?
Yes, provided it is included in equipment qualification protocols (IQ/OQ/PQ), maintained per manufacturer-recommended service intervals, and used with documented sieve calibration records.
Does the device include a sieve cleaning function?
No—it is strictly a sieving apparatus; post-run sieve cleaning must be performed manually using compressed air, soft brushes, or ultrasonic baths.
What safety certifications does the SZH-4 carry?
It complies with GB 4706.1 (Chinese national standard equivalent to IEC 60335-1) for household and similar electrical appliances, and carries CCC mark certification for domestic market compliance.