Chengdu Jingxin JL-A302 Bulk Density Tester (Natural Packing Method)

Overview

The Chengdu Jingxin JL-A302 Bulk Density Tester is a precision-engineered, portable apparatus designed for the standardized measurement of bulk (loose) density of dry, free-flowing or marginally cohesive powders and granular materials. It operates on the principle of natural packing—where powder flows under gravity from a fixed-height funnel into a calibrated cylindrical receiver—per the methodology defined in GB/T 16913–2008, which aligns closely with international practices such as ASTM D1895 (Method A) and ISO 697. This instrument does not apply mechanical vibration, tapping, or compression; instead, it quantifies the mass per unit volume of material in its naturally settled state following controlled gravitational deposition. The resulting bulk density value is critical for process design, storage capacity estimation, flow behavior assessment, and quality control across powder-handling industries. Its compact footprint, all-stainless-steel construction, and alignment with traceable national standards make it suitable for routine QC labs, R&D facilities, and regulatory-compliant environments where reproducibility and method fidelity are essential.

Key Features

• Stainless steel (ASTM A240 304) funnel with precisely machined 12.7 mm orifice and 60° conical angle—ensuring consistent flow geometry and minimizing wall adhesion.
• Fixed vertical drop height of 115 mm ± 2 mm between funnel outlet and top rim of the 100 mL receiving cylinder—maintaining strict adherence to GB/T 16913–2008 dimensional tolerances.
• High-precision stainless steel scraper blade (25 mm wide) for level-off operation—enabling repeatable removal of excess powder without compaction or lateral shear.
• Robust modular frame with rigid base plate and adjustable funnel mount—providing mechanical stability during repeated testing cycles.
• Corrosion-resistant, non-magnetic 304 stainless steel cylinder (100 mL nominal volume) with engraved calibration mark—facilitating visual alignment and long-term volumetric integrity.
• Portable form factor (160 × 160 × 300 mm, 3.7 kg)—optimized for benchtop use, mobile lab deployment, or field-based sampling verification.

Sample Compatibility & Compliance

The JL-A302 is validated for use with dry, non-hygroscopic, non-fibrous powders and granules ranging from ~10 µm to 2 mm in particle size. It accommodates both free-flowing materials (e.g., lactose monohydrate, sodium chloride) and moderately cohesive powders (e.g., microcrystalline cellulose, certain metal oxides), provided they exhibit no bridging or rat-holing at the funnel orifice. The device conforms to GB/T 16913–2008 and supports alignment with broader regulatory frameworks: test procedures may be documented within GLP-compliant SOPs, and raw data (mass + volume) can be recorded in audit-trail-enabled LIMS or electronic lab notebooks. While the instrument itself does not include integrated data logging, its operational parameters are fully compatible with FDA 21 CFR Part 11–aligned workflows when paired with compliant balances and documentation systems.

Software & Data Management

The JL-A302 is a manual, hardware-only system requiring external mass measurement via an analytical balance (≥1000 g capacity, ≤0.02 g readability). No embedded firmware, touchscreen interface, or proprietary software is included. However, its deterministic, stepwise protocol enables seamless integration into digital QA/QC ecosystems: users may record mass values directly into spreadsheet templates, LIMS databases, or validated electronic notebooks. For laboratories operating under ISO/IEC 17025 or pharmaceutical GMP, the instrument’s design allows full traceability—each test can be associated with operator ID, timestamp, environmental conditions (temperature/humidity logged separately), and balance calibration certificate number. Replicate measurements (n ≥ 3 per sample, per standard) support statistical evaluation including mean, standard deviation, and %RSD—key metrics for method validation and process capability analysis.

Applications

• Pharmaceutical manufacturing: Bulk density assessment of active pharmaceutical ingredients (APIs), excipients (e.g., mannitol, starch), and blended powders prior to tableting or capsule filling.
• Food processing: Characterization of flour, sugar, powdered dairy, and functional food additives for silo design and pneumatic conveying system specification.
• Battery materials: Evaluation of cathode/anode powders (e.g., NMC, graphite) to correlate bulk density with electrode coating uniformity and calendering response.
• Chemical & catalyst production: Monitoring lot-to-lot consistency of heterogeneous catalysts, pigments, and polymer resins.
• Academic & metrology research: Teaching fundamental powder mechanics; supporting interlaboratory comparison studies aligned with ISO/TC 24/SC 4 standards.
• Quality assurance in contract testing labs: Supporting client-specific test reports compliant with CNAS, CMA, or ISO 17025 accreditation requirements.

FAQ

Does the JL-A302 comply with ASTM or ISO standards?
It implements the natural packing method equivalent to ASTM D1895 Method A and ISO 697, though formal certification requires user validation per their internal SOPs.
Is calibration required for the JL-A302 itself?
No—its geometry is fixed and dimensionally certified per GB/T 16913–2008; only the external balance requires periodic calibration and traceable verification.
Can it measure tapped density?
No—tapped density requires mechanical vibration per GB/T 5162 or ASTM D4781; this instrument is dedicated to loose (untapped) density only.
What maintenance is recommended?
Routine cleaning with lint-free cloth and ethanol; inspection of funnel orifice for debris; periodic verification of cylinder volume using certified water displacement method.
Is the 100 mL cylinder graduated or volumetrically certified?
It is a Class B volumetric cylinder marked at the 100 mL line; for higher accuracy, users may perform gravimetric volume verification using distilled water at 20 °C.