Hanson Flodex Powder Flow Tester
| Brand | Hanson |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | Flodex |
| Pricing | Available Upon Request |
Overview
The Hanson Flodex Powder Flow Tester is a standardized, gravity-driven instrument engineered for the quantitative assessment of powder flow behavior in pharmaceutical development and manufacturing. It operates on the principle of measuring the time required for a defined mass of powder to pass freely through a circular orifice in a horizontal stainless-steel disc under controlled gravitational conditions—directly aligning with the methodology described in United States Pharmacopeia (USP) “Powder Flowability.” Unlike dynamic shear cell or rotational rheometry approaches, the Flodex method evaluates *inherent* flow propensity based on interparticle friction, cohesion, and aerodynamic resistance, making it especially suitable for early-stage formulation screening, raw material qualification, and batch-to-batch consistency verification. Its design eliminates operator-dependent variables such as tapping energy or blade speed, ensuring high reproducibility across laboratories and operators.
Key Features
- Full compliance with USP for standardized powder flow index determination
- Pre-calibrated, gravity-fed stainless-steel funnel assembly with electrostatic-dissipative construction (304 stainless steel) to minimize charge accumulation during powder discharge
- Interchangeable disc set comprising 19 precision-machined orifices (4–34 mm diameter in 1–2 mm increments), enabling systematic evaluation across particle size distributions and flow regimes
- No external power supply, software, or calibration weights required—operation relies solely on gravitational force and timed manual measurement
- Compact, benchtop footprint with integrated base plate and stopwatch-compatible timing protocol for rapid deployment in QC labs or R&D environments
- Designed for minimal operator training: consistent results achievable after ≤15 minutes of procedural familiarization
Sample Compatibility & Compliance
The Flodex system accommodates dry, free-flowing to marginally cohesive powders within typical pharmaceutical processing ranges—including active pharmaceutical ingredients (APIs), excipients (e.g., lactose monohydrate, microcrystalline cellulose), granules, and direct compression blends. It has also been validated for use with non-pharmaceutical materials such as roasted coffee grounds, food-grade starches, and ceramic precursors where gravity-based flow ranking is required. All test procedures conform to USP definitions of flow index (FI), calculated as FI = 100 × (tref/tsample), where tref is the flow time of a reference standard (e.g., quartz sand). The instrument supports GLP-compliant documentation when paired with traceable stopwatches and controlled environmental conditions (20–25°C, RH <60%). While not an ISO 4778-certified device per se, its operational logic maps directly to ISO 4778-2 Annex B guidelines for orifice flow testing.
Software & Data Management
The Flodex Powder Flow Tester is a hardware-only, analog measurement system with no embedded electronics or digital interface. Data collection follows a manual, paper-based or spreadsheet-supported workflow: users record flow times per disc, calculate flow indices, and plot flow index vs. orifice diameter to generate flow profile curves. This architecture ensures full audit trail transparency and eliminates risks associated with electronic data integrity (EDI) gaps. For regulated environments operating under FDA 21 CFR Part 11 or EU Annex 11 requirements, laboratories may integrate Flodex-generated data into validated LIMS or ELN platforms via documented SOPs—no proprietary software licensing or validation packages are required. Calibration is verified annually using NIST-traceable timing devices and certified reference powders.
Applications
- Raw material release testing against predefined flow index acceptance criteria
- Formulation optimization: correlating excipient ratios with flow performance across multiple orifice sizes
- Stability monitoring: detecting flow degradation due to moisture uptake, crystallization, or phase separation over storage time
- Process risk assessment: identifying batches prone to hopper arching, bridging, or feed variability in capsule fillers or tablet presses
- Educational use in pharmaceutics courses to demonstrate fundamental powder physics concepts (e.g., angle of repose correlation, compressibility effects)
- Cross-industry benchmarking for food, nutraceutical, and agrochemical powders requiring regulatory-aligned flow classification
FAQ
Does the Flodex require periodic recalibration?
No—calibration is not performed on the instrument itself. Instead, users verify timing accuracy using a traceable stopwatch and validate results against certified reference powders at defined intervals per internal SOP.
Can Flodex data be used for regulatory submissions?
Yes—when executed per USP and documented within a validated quality management system, Flodex-derived flow indices are accepted in IND, NDA, and CMC sections by major regulatory agencies including FDA and EMA.
Is the stainless-steel disc set autoclavable?
Yes—the 304 stainless-steel discs and funnel are compatible with standard laboratory autoclaving cycles (121°C, 15 psi, 15 min); however, repeated thermal cycling may affect surface finish over extended use.
What environmental conditions affect Flodex measurements?
Relative humidity above 60% and ambient temperatures outside 20–25°C significantly influence cohesion and electrostatic behavior; therefore, testing must occur in climate-controlled environments per USP .
How does Flodex compare to Carr Index or Hausner Ratio methods?
Flodex measures dynamic flow under gravity, whereas Carr Index and Hausner Ratio assess static compressibility. These methods are complementary—not interchangeable—and collectively provide a more complete picture of powder handling behavior.
