Zhongkejunchi BR08 Rotary Sample Divider
| Brand | Zhongkejunchi |
|---|---|
| Origin | Beijing, China |
| Model | BR08 |
| Sample Division Capacity | 6 / 8 / 10 fractions |
| Feed Size Limit | <10 mm |
| Maximum Batch Volume | <5000 mL |
| Fraction Vial Options | 30 / 100 / 250 / 500 mL |
| Time Setting Range | 00:01–59:59 (mm:ss) |
| Operating Principle | Eccentric funnel feed + rotating distributor crown with gravity-driven, symmetrical radial discharge |
Overview
The Zhongkejunchi BR08 Rotary Sample Divider is an electromechanically controlled, gravity-fed sample splitting instrument engineered for high-reproducibility subdivision of bulk granular and powdered materials. It operates on the principle of rotational symmetry and controlled gravitational flow: bulk material enters via an eccentrically positioned feed funnel into a central distributor chamber; a motor-driven, precision-balanced distribution crown rotates at a stable, user-defined speed, directing equal volumetric portions radially outward through identical orifices into pre-positioned receiving vials. This design ensures minimal particle segregation, no mechanical shearing, and preservation of original particle size distribution, moisture content, and chemical integrity—critical for downstream analytical validity in quality control and regulatory testing.
Key Features
- Programmable division cycle timing (00:01–59:59 mm:ss) with analog-style interface for robust operation in industrial environments
- Stable rotational speed control across all operating loads, ensuring consistent mass distribution regardless of feed rate or material density
- Modular vial holder system supporting rapid interchange of standard glass or polypropylene vials (30 mL, 100 mL, 250 mL, and 500 mL capacities)
- Tool-free, snap-in vial mounting mechanism enabling sub-10-second vial replacement without alignment calibration
- Compact footprint (W × D × H ≈ 320 × 380 × 520 mm) suitable for fume hoods, QC labs, and production floor integration
- Feed hopper with ≤10 mm maximum particle size tolerance—compatible with coarse aggregates (e.g., slag, sand), milled minerals, and fine powders (e.g., flour, metal powders, pharmaceutical excipients)
- No lubrication points or consumable wear parts; stainless-steel contact surfaces ensure corrosion resistance and ease of cleaning per ISO 22000 hygiene protocols
Sample Compatibility & Compliance
The BR08 accommodates free-flowing, non-cohesive, and moderately cohesive dry particulates—including cement clinker, agricultural grains, roasted coffee beans, soil aggregates, fertilizer granules, polymer pellets, and metallurgical powders. It is not intended for sticky, hygroscopic, fibrous, or liquid-suspended materials. While the instrument itself does not carry CE or UL certification, its mechanical architecture complies with general safety principles outlined in IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emissions). Its operation supports adherence to ASTM D6938 (standard practice for sampling bulk solids), ISO 14855-1 (biodegradability testing sample preparation), and USP & Ph. Eur. general chapter <1175> on representative sampling for solid dosage forms. When integrated into GLP/GMP workflows, manual logging of time, speed, and vial configuration satisfies traceability requirements for audit readiness.
Software & Data Management
The BR08 operates as a standalone electromechanical device with no embedded microprocessor or digital connectivity. All operational parameters—including rotation duration, nominal speed (RPM), and feed initiation—are set manually via front-panel dials and push-button controls. This analog architecture eliminates firmware dependencies, cybersecurity risks, and software validation burdens—making it especially suitable for regulated environments where change control complexity must be minimized. Users maintain full procedural traceability through laboratory notebooks or LIMS-integrated SOPs documenting batch ID, operator, date/time, vial configuration, and observed flow behavior. Optional synchronization with external vibratory feeders (sold separately) enables semi-automated batch loading while preserving manual intervention points required under FDA 21 CFR Part 11 Annex 11 “paper-based” compliance pathways.
Applications
- Preparation of subsamples for XRF, XRD, and laser diffraction particle size analysis (ISO 13320)
- Homogenization and splitting of heterogeneous soil composites prior to heavy metal extraction (EPA Method 3050B)
- Representative sampling of bulk cement, fly ash, and slag for compressive strength testing (ASTM C150, C618)
- Portioning of agricultural commodities (grains, seeds, nuts) for mycotoxin screening and moisture determination (AOAC 992.15, ISO 712)
- QC sampling of food-grade powders (dairy, starch, cocoa) in compliance with HACCP prerequisite programs
- Division of metal and ceramic powders for sintering trials and flowability assessment (ASTM B213, ISO 4490)
FAQ
Is the BR08 suitable for moisture-sensitive samples?
Yes—its fully enclosed feed path and absence of heating elements or air agitation prevent desiccation or condensation-induced caking.
Can it handle abrasive materials like silica sand or alumina?
Yes—the distributor crown and feed funnel are constructed from hardened stainless steel (AISI 304), offering resistance to low-to-moderate abrasion over extended service life.
Does it require calibration or periodic verification?
No formal calibration is mandated; however, users should perform routine visual inspection of vial alignment and conduct mass-balance verification (±2% deviation across fractions) at least weekly per internal SOPs.
What maintenance is required?
None beyond wiping down stainless-steel surfaces with ethanol or isopropanol after each use and inspecting the eccentric funnel for residual bridging.
Is technical support available in English?
Yes—Zhongkejunchi provides English-language operation manuals, troubleshooting guides, and remote video-assisted commissioning support upon request.
